166261256376 has 128 divisors (see below), whose sum is σ = 423847987200. Its totient is φ = 54341181440.

The previous prime is 166261256347. The next prime is 166261256393. The reversal of 166261256376 is 673652162661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 170174800 + ... + 170175776.

It is an arithmetic number, because the mean of its divisors is an integer number (3311312400).

Almost surely, 2^166261256376 is an apocalyptic number.

It is an amenable number.

166261256376 is an abundant number, since it is smaller than the sum of its proper divisors (257586730824).

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

166261256376 is a wasteful number, since it uses less digits than its factorization.

166261256376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709 (or 1705 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 51.

The spelling of 166261256376 in words is "one hundred sixty-six billion, two hundred sixty-one million, two hundred fifty-six thousand, three hundred seventy-six".