16660456738 has 16 divisors (see below), whose sum is σ = 25150849920. Its totient is φ = 8276882176.

The previous prime is 16660456699. The next prime is 16660456777. The reversal of 16660456738 is 83765406661.

It is an interprime number because it is at equal distance from previous prime (16660456699) and next prime (16660456777).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 910443 + ... + 928561.

It is an arithmetic number, because the mean of its divisors is an integer number (1571928120).

Almost surely, 2^16660456738 is an apocalyptic number.

16660456738 is a deficient number, since it is larger than the sum of its proper divisors (8490393182).

16660456738 is a wasteful number, since it uses less digits than its factorization.

16660456738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21041.

The product of its (nonzero) digits is 4354560, while the sum is 52.

The spelling of 16660456738 in words is "sixteen billion, six hundred sixty million, four hundred fifty-six thousand, seven hundred thirty-eight".