664566136 has 32 divisors (see below), whose sum is σ = 1349888400. Its totient is φ = 306714720.

The previous prime is 664566101. The next prime is 664566137. The reversal of 664566136 is 631665466.

It is a junction number, because it is equal to n+sod(n) for n = 664566092 and 664566101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664566137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1330 + ... + 36481.

Almost surely, 2^664566136 is an apocalyptic number.

It is an amenable number.

664566136 is an abundant number, since it is smaller than the sum of its proper divisors (685322264).

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

664566136 is a wasteful number, since it uses less digits than its factorization.

664566136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37856 (or 37826 counting only the distinct ones).

The product of its digits is 466560, while the sum is 43.

The square root of 664566136 is about 25779.1802817700. The cubic root of 664566136 is about 872.6620081587.

The spelling of 664566136 in words is "six hundred sixty-four million, five hundred sixty-six thousand, one hundred thirty-six".