16944400566 has 12 divisors (see below), whose sum is σ = 36712867932. Its totient is φ = 5648133516.

The previous prime is 16944400553. The next prime is 16944400607. The reversal of 16944400566 is 66500444961.

It is a happy number.

16944400566 is a `hidden beast` number, since 1 + 6 + 9 + 44 + 40 + 0 + 566 = 666.

It is a super-2 number, since 2×16944400566² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 470677776 + ... + 470677811.

It is an arithmetic number, because the mean of its divisors is an integer number (3059405661).

Almost surely, 2^16944400566 is an apocalyptic number.

16944400566 is an abundant number, since it is smaller than the sum of its proper divisors (19768467366).

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

16944400566 is a wasteful number, since it uses less digits than its factorization.

16944400566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941355595 (or 941355592 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 16944400566 in words is "sixteen billion, nine hundred forty-four million, four hundred thousand, five hundred sixty-six".