656991484 has 12 divisors (see below), whose sum is σ = 1150582104. Its totient is φ = 328253744.

The previous prime is 656991451. The next prime is 656991509. The reversal of 656991484 is 484199656.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54322 + ... + 65305.

It is an arithmetic number, because the mean of its divisors is an integer number (95881842).

Almost surely, 2^656991484 is an apocalyptic number.

It is an amenable number.

656991484 is a deficient number, since it is larger than the sum of its proper divisors (493590620).

656991484 is a wasteful number, since it uses less digits than its factorization.

656991484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121004 (or 121002 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 52.

The square root of 656991484 is about 25631.8451150127. The cubic root of 656991484 is about 869.3338292248. Note that the first 3 decimals are identical.

The spelling of 656991484 in words is "six hundred fifty-six million, nine hundred ninety-one thousand, four hundred eighty-four".