166616556650564 has 12 divisors (see below), whose sum is σ = 292112025283344. Its totient is φ = 83155977998184.

The previous prime is 166616556650527. The next prime is 166616556650573. The reversal of 166616556650564 is 465056655616661.

It is a super-2 number, since 2×166616556650564² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166616556650494 and 166616556650503.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38075079314 + ... + 38075083689.

It is an arithmetic number, because the mean of its divisors is an integer number (24342668773612).

Almost surely, 2^{166616556650564} is an apocalyptic number.

It is an amenable number.

166616556650564 is a deficient number, since it is larger than the sum of its proper divisors (125495468632780).

166616556650564 is a wasteful number, since it uses less digits than its factorization.

166616556650564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76150163554 (or 76150163552 counting only the distinct ones).

The product of its (nonzero) digits is 699840000, while the sum is 68.

The spelling of 166616556650564 in words is "one hundred sixty-six trillion, six hundred sixteen billion, five hundred fifty-six million, six hundred fifty thousand, five hundred sixty-four".