16866909423936 has 1344 divisors, whose sum is σ = 61229540736000. Its totient is φ = 4363239260160.

The previous prime is 16866909423817. The next prime is 16866909423983. The reversal of 16866909423936 is 63932490966861.

It is a happy number.

16866909423936 is a `hidden beast` number, since 1 + 6 + 8 + 66 + 90 + 94 + 2 + 393 + 6 = 666.

It is a super-2 number, since 2×16866909423936² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 11560595175 + ... + 11560596633.

It is an arithmetic number, because the mean of its divisors is an integer number (45557694000).

Almost surely, 2^{16866909423936} is an apocalyptic number.

16866909423936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16866909423936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30614770368000).

16866909423936 is an abundant number, since it is smaller than the sum of its proper divisors (44362631312064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16866909423936 is a wasteful number, since it uses less digits than its factorization.

16866909423936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692 (or 1679 counting only the distinct ones).

The product of its (nonzero) digits is 544195584, while the sum is 72.

The spelling of 16866909423936 in words is "sixteen trillion, eight hundred sixty-six billion, nine hundred nine million, four hundred twenty-three thousand, nine hundred thirty-six".