166384699040 has 192 divisors, whose sum is σ = 451866159360. Its totient is φ = 56713789440.

The previous prime is 166384699001. The next prime is 166384699043. The reversal of 166384699040 is 40996483661.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is not an unprimeable number, because it can be changed into a prime (166384699043) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 251716310 + ... + 251716970.

It is an arithmetic number, because the mean of its divisors is an integer number (2353469580).

Almost surely, 2^166384699040 is an apocalyptic number.

166384699040 is a gapful number since it is divisible by the number (10) 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 166384699040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225933079680).

166384699040 is an abundant number, since it is smaller than the sum of its proper divisors (285481460320).

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

166384699040 is a wasteful number, since it uses less digits than its factorization.

166384699040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655 (or 1647 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 56.

The spelling of 166384699040 in words is "one hundred sixty-six billion, three hundred eighty-four million, six hundred ninety-nine thousand, forty".