656425166 has 4 divisors (see below), whose sum is σ = 984637752. Its totient is φ = 328212582.

The previous prime is 656425157. The next prime is 656425201. The reversal of 656425166 is 661524656.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164106290 + ... + 164106293.

It is an arithmetic number, because the mean of its divisors is an integer number (246159438).

Almost surely, 2^656425166 is an apocalyptic number.

656425166 is a deficient number, since it is larger than the sum of its proper divisors (328212586).

656425166 is a wasteful number, since it uses less digits than its factorization.

656425166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328212585.

The product of its digits is 259200, while the sum is 41.

The square root of 656425166 is about 25620.7955770308. The cubic root of 656425166 is about 869.0839726524.

The spelling of 656425166 in words is "six hundred fifty-six million, four hundred twenty-five thousand, one hundred sixty-six".