64680804 has 36 divisors (see below), whose sum is σ = 165126780. Its totient is φ = 21345600.

The previous prime is 64680797. The next prime is 64680841. The reversal of 64680804 is 40808646.

64680804 is a `hidden beast` number, since 646 + 8 + 0 + 8 + 0 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 62726400 + 1954404 = 7920^2 + 1398^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5259 + ... + 12530.

It is an arithmetic number, because the mean of its divisors is an integer number (4586855).

Almost surely, 2^64680804 is an apocalyptic number.

It is an amenable number.

64680804 is an abundant number, since it is smaller than the sum of its proper divisors (100445976).

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

64680804 is a wasteful number, since it uses less digits than its factorization.

64680804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17900 (or 17895 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 64680804 is about 8042.4376901534. The cubic root of 64680804 is about 401.4133419464.

The spelling of 64680804 in words is "sixty-four million, six hundred eighty thousand, eight hundred four".