16577865066 has 128 divisors (see below), whose sum is σ = 42194350080. Its totient is φ = 4233005568.

The previous prime is 16577865053. The next prime is 16577865067. The reversal of 16577865066 is 66056877561.

It is a super-2 number, since 2×16577865066² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 16577864997 and 16577865015.

It is not an unprimeable number, because it can be changed into a prime (16577865067) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1333656 + ... + 1346028.

It is an arithmetic number, because the mean of its divisors is an integer number (329643360).

Almost surely, 2^16577865066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16577865066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21097175040).

16577865066 is an abundant number, since it is smaller than the sum of its proper divisors (25616485014).

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

16577865066 is a wasteful number, since it uses less digits than its factorization.

16577865066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12500.

The product of its (nonzero) digits is 12700800, while the sum is 57.

The spelling of 16577865066 in words is "sixteen billion, five hundred seventy-seven million, eight hundred sixty-five thousand, sixty-six".