667171256 has 32 divisors (see below), whose sum is σ = 1337672880. Its totient is φ = 310848000.

The previous prime is 667171237. The next prime is 667171283. The reversal of 667171256 is 652171766.

667171256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10550 + ... + 38021.

Almost surely, 2^667171256 is an apocalyptic number.

It is an amenable number.

667171256 is an abundant number, since it is smaller than the sum of its proper divisors (670501624).

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

667171256 is a wasteful number, since it uses less digits than its factorization.

667171256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48695 (or 48691 counting only the distinct ones).

The product of its digits is 105840, while the sum is 41.

The square root of 667171256 is about 25829.6584568980. The cubic root of 667171256 is about 873.8008088462.

The spelling of 667171256 in words is "six hundred sixty-seven million, one hundred seventy-one thousand, two hundred fifty-six".