656694160 has 80 divisors (see below), whose sum is σ = 1603183104. Its totient is φ = 249683456.

The previous prime is 656694127. The next prime is 656694163. The reversal of 656694160 is 61496656.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (656694163) 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 in 15 ways as a sum of consecutive naturals, for example, 317289 + ... + 319351.

Almost surely, 2^656694160 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656694160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (801591552).

656694160 is an abundant number, since it is smaller than the sum of its proper divisors (946488944).

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

656694160 is a wasteful number, since it uses less digits than its factorization.

656694160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272 (or 2266 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 656694160 is about 25626.0445640758. The cubic root of 656694160 is about 869.2026693246.

The spelling of 656694160 in words is "six hundred fifty-six million, six hundred ninety-four thousand, one hundred sixty".