16665555066 has 32 divisors (see below), whose sum is σ = 34062467328. Its totient is φ = 5433446400.

The previous prime is 16665555037. The next prime is 16665555091. The reversal of 16665555066 is 66055556661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 433026 + ... + 469938.

It is an arithmetic number, because the mean of its divisors is an integer number (1064452104).

Almost surely, 2^16665555066 is an apocalyptic number.

16665555066 is an abundant number, since it is smaller than the sum of its proper divisors (17396912262).

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

16665555066 is a wasteful number, since it uses less digits than its factorization.

16665555066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38566.

The product of its (nonzero) digits is 4860000, while the sum is 51.

The spelling of 16665555066 in words is "sixteen billion, six hundred sixty-five million, five hundred fifty-five thousand, sixty-six".