664677040 has 20 divisors (see below), whose sum is σ = 1545374304. Its totient is φ = 265870784.

The previous prime is 664677001. The next prime is 664677053. The reversal of 664677040 is 40776466.

664677040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 664676984 and 664677002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4154152 + ... + 4154311.

Almost surely, 2^664677040 is an apocalyptic number.

It is an amenable number.

664677040 is an abundant number, since it is smaller than the sum of its proper divisors (880697264).

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

664677040 is a wasteful number, since it uses less digits than its factorization.

664677040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8308476 (or 8308470 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 40.

The square root of 664677040 is about 25781.3312301751. The cubic root of 664677040 is about 872.7105492639.

The spelling of 664677040 in words is "six hundred sixty-four million, six hundred seventy-seven thousand, forty".