664326136 has 32 divisors (see below), whose sum is σ = 1320297840. Its totient is φ = 312288768.

The previous prime is 664326133. The next prime is 664326137. The reversal of 664326136 is 631623466.

It is a junction number, because it is equal to n+sod(n) for n = 664326095 and 664326104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664326133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162955 + ... + 166981.

Almost surely, 2^664326136 is an apocalyptic number.

It is an amenable number.

664326136 is a deficient number, since it is larger than the sum of its proper divisors (655971704).

664326136 is a wasteful number, since it uses less digits than its factorization.

664326136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5263 (or 5259 counting only the distinct ones).

The product of its digits is 93312, while the sum is 37.

The square root of 664326136 is about 25774.5249422759. The cubic root of 664326136 is about 872.5569450768.

The spelling of 664326136 in words is "six hundred sixty-four million, three hundred twenty-six thousand, one hundred thirty-six".