656665674 has 32 divisors (see below), whose sum is σ = 1517823360. Its totient is φ = 185509632.

The previous prime is 656665673. The next prime is 656665697. The reversal of 656665674 is 476566656.

656665674 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (656665673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84099 + ... + 91574.

It is an arithmetic number, because the mean of its divisors is an integer number (47431980).

Almost surely, 2^656665674 is an apocalyptic number.

656665674 is an abundant number, since it is smaller than the sum of its proper divisors (861157686).

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

656665674 is a wasteful number, since it uses less digits than its factorization.

656665674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175774.

The product of its digits is 5443200, while the sum is 51.

The square root of 656665674 is about 25625.4887563145. The cubic root of 656665674 is about 869.1901010867.

The spelling of 656665674 in words is "six hundred fifty-six million, six hundred sixty-five thousand, six hundred seventy-four".