663257136 has 20 divisors (see below), whose sum is σ = 1713414392. Its totient is φ = 221085696.

The previous prime is 663257083. The next prime is 663257137. The reversal of 663257136 is 631752366.

It is a junction number, because it is equal to n+sod(n) for n = 663257094 and 663257103.

It is not an unprimeable number, because it can be changed into a prime (663257137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6908881 + ... + 6908976.

Almost surely, 2^663257136 is an apocalyptic number.

It is an amenable number.

663257136 is an abundant number, since it is smaller than the sum of its proper divisors (1050157256).

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

663257136 is a wasteful number, since it uses less digits than its factorization.

663257136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13817868 (or 13817862 counting only the distinct ones).

The product of its digits is 136080, while the sum is 39.

The square root of 663257136 is about 25753.7790624988. The cubic root of 663257136 is about 872.0886689847.

The spelling of 663257136 in words is "six hundred sixty-three million, two hundred fifty-seven thousand, one hundred thirty-six".