2567256166 has 4 divisors (see below), whose sum is σ = 3850884252. Its totient is φ = 1283628082.

The previous prime is 2567256161. The next prime is 2567256199. The reversal of 2567256166 is 6616527652.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2567256161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641814040 + ... + 641814043.

It is an arithmetic number, because the mean of its divisors is an integer number (962721063).

Almost surely, 2^2567256166 is an apocalyptic number.

2567256166 is a deficient number, since it is larger than the sum of its proper divisors (1283628086).

2567256166 is a wasteful number, since it uses less digits than its factorization.

2567256166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283628085.

The product of its digits is 907200, while the sum is 46.

The square root of 2567256166 is about 50668.0981091653. The cubic root of 2567256166 is about 1369.2720244904.

The spelling of 2567256166 in words is "two billion, five hundred sixty-seven million, two hundred fifty-six thousand, one hundred sixty-six".