166111123563 has 72 divisors (see below), whose sum is σ = 301608862464. Its totient is φ = 86234591520.

The previous prime is 166111123543. The next prime is 166111123589. The reversal of 166111123563 is 365321111661.

166111123563 is a `hidden beast` number, since 1 + 6 + 61 + 1 + 11 + 23 + 563 = 666.

It is not a de Polignac number, because 166111123563 - 2⁶ = 166111123499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166111123513) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 13128106 + ... + 13140752.

Almost surely, 2^166111123563 is an apocalyptic number.

166111123563 is a deficient number, since it is larger than the sum of its proper divisors (135497738901).

166111123563 is a wasteful number, since it uses less digits than its factorization.

166111123563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14405 (or 14391 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The spelling of 166111123563 in words is "one hundred sixty-six billion, one hundred eleven million, one hundred twenty-three thousand, five hundred sixty-three".