166261256 has 32 divisors (see below), whose sum is σ = 360288000. Its totient is φ = 70452096.

The previous prime is 166261253. The next prime is 166261279. The reversal of 166261256 is 652162661.

It is not an unprimeable number, because it can be changed into a prime (166261253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11696 + ... + 21663.

It is an arithmetic number, because the mean of its divisors is an integer number (11259000).

Almost surely, 2^166261256 is an apocalyptic number.

It is an amenable number.

166261256 is an abundant number, since it is smaller than the sum of its proper divisors (194026744).

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

166261256 is a wasteful number, since it uses less digits than its factorization.

166261256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33461 (or 33457 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 166261256 is about 12894.2334397978. The cubic root of 166261256 is about 549.8746336853.

The spelling of 166261256 in words is "one hundred sixty-six million, two hundred sixty-one thousand, two hundred fifty-six".