64706920 has 32 divisors (see below), whose sum is σ = 150289920. Its totient is φ = 25047360.

The previous prime is 64706903. The next prime is 64706933. The reversal of 64706920 is 2960746.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24852 + ... + 27331.

It is an arithmetic number, because the mean of its divisors is an integer number (4696560).

Almost surely, 2^64706920 is an apocalyptic number.

It is an amenable number.

64706920 is an abundant number, since it is smaller than the sum of its proper divisors (85583000).

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

64706920 is a wasteful number, since it uses less digits than its factorization.

64706920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52225 (or 52221 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 64706920 is about 8044.0611633677. The cubic root of 64706920 is about 401.4673605504.

The spelling of 64706920 in words is "sixty-four million, seven hundred six thousand, nine hundred twenty".