166511051656 has 32 divisors (see below), whose sum is σ = 315381605760. Its totient is φ = 82410020352.

The previous prime is 166511051633. The next prime is 166511051669. The reversal of 166511051656 is 656150115661.

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, 1828501 + ... + 1917403.

It is an arithmetic number, because the mean of its divisors is an integer number (9855675180).

Almost surely, 2^166511051656 is an apocalyptic number.

It is an amenable number.

166511051656 is a deficient number, since it is larger than the sum of its proper divisors (148870554104).

166511051656 is a wasteful number, since it uses less digits than its factorization.

166511051656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91285 (or 91281 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 43.

The spelling of 166511051656 in words is "one hundred sixty-six billion, five hundred eleven million, fifty-one thousand, six hundred fifty-six".