16656510642 has 16 divisors (see below), whose sum is σ = 33487437312. Its totient is φ = 5523100880.

The previous prime is 16656510623. The next prime is 16656510643. The reversal of 16656510642 is 24601565661.

It is a junction number, because it is equal to n+sod(n) for n = 16656510594 and 16656510603.

It is not an unprimeable number, because it can be changed into a prime (16656510643) 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, 7266093 + ... + 7268384.

It is an arithmetic number, because the mean of its divisors is an integer number (2092964832).

Almost surely, 2^16656510642 is an apocalyptic number.

16656510642 is an abundant number, since it is smaller than the sum of its proper divisors (16830926670).

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

16656510642 is a wasteful number, since it uses less digits than its factorization.

16656510642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14534673.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 16656510642 in words is "sixteen billion, six hundred fifty-six million, five hundred ten thousand, six hundred forty-two".