664982136 has 336 divisors, whose sum is σ = 2354977800. Its totient is φ = 174400128.

The previous prime is 664982117. The next prime is 664982161. The reversal of 664982136 is 631289466.

664982136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×664982136³ (a number of 27 digits) contains 333 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 664982091 and 664982100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 3714895 + ... + 3715073.

Almost surely, 2^664982136 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 664982136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1177488900).

664982136 is an abundant number, since it is smaller than the sum of its proper divisors (1689995664).

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

664982136 is a wasteful number, since it uses less digits than its factorization.

664982136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230 (or 204 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 664982136 is about 25787.2475460255. The cubic root of 664982136 is about 872.8440575961.

The spelling of 664982136 in words is "six hundred sixty-four million, nine hundred eighty-two thousand, one hundred thirty-six".