16656065660 has 24 divisors (see below), whose sum is σ = 37668333696. Its totient is φ = 6149931840.

The previous prime is 16656065653. The next prime is 16656065663. The reversal of 16656065660 is 6656065661.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16656065663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32030636 + ... + 32031155.

It is an arithmetic number, because the mean of its divisors is an integer number (1569513904).

Almost surely, 2^16656065660 is an apocalyptic number.

16656065660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16656065660 is an abundant number, since it is smaller than the sum of its proper divisors (21012268036).

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

16656065660 is a wasteful number, since it uses less digits than its factorization.

16656065660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64061813 (or 64061811 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 47.

Subtracting from 16656065660 its reverse (6656065661), we obtain a palindrome (9999999999).

The spelling of 16656065660 in words is "sixteen billion, six hundred fifty-six million, sixty-five thousand, six hundred sixty".