656994148 has 12 divisors (see below), whose sum is σ = 1171433340. Its totient is φ = 322298912.

The previous prime is 656994139. The next prime is 656994167. The reversal of 656994148 is 841499656.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 533517604 + 123476544 = 23098^2 + 11112^2 .

It is a junction number, because it is equal to n+sod(n) for n = 656994095 and 656994104.

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, 1549303 + ... + 1549726.

It is an arithmetic number, because the mean of its divisors is an integer number (97619445).

Almost surely, 2^656994148 is an apocalyptic number.

It is an amenable number.

656994148 is a deficient number, since it is larger than the sum of its proper divisors (514439192).

656994148 is a wasteful number, since it uses less digits than its factorization.

656994148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3099086 (or 3099084 counting only the distinct ones).

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

The square root of 656994148 is about 25631.8970815662. The cubic root of 656994148 is about 869.3350042284.

The spelling of 656994148 in words is "six hundred fifty-six million, nine hundred ninety-four thousand, one hundred forty-eight".