664313436 has 18 divisors (see below), whose sum is σ = 1679236832. Its totient is φ = 221437800.

The previous prime is 664313413. The next prime is 664313443. The reversal of 664313436 is 634313466.

664313436 is a `hidden beast` number, since 6 + 643 + 1 + 3 + 4 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 18453151 = 664313436 / (6 + 6 + 4 + 3 + 1 + 3 + 4 + 3 + 6).

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

It is a self number, because there is not a number n which added to its sum of digits gives 664313436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9226540 + ... + 9226611.

Almost surely, 2^664313436 is an apocalyptic number.

It is an amenable number.

664313436 is an abundant number, since it is smaller than the sum of its proper divisors (1014923396).

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

664313436 is a wasteful number, since it uses less digits than its factorization.

664313436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18453161 (or 18453156 counting only the distinct ones).

The product of its digits is 93312, while the sum is 36.

The square root of 664313436 is about 25774.2785738030. The cubic root of 664313436 is about 872.5513847839.

The spelling of 664313436 in words is "six hundred sixty-four million, three hundred thirteen thousand, four hundred thirty-six".