664466442264 has 64 divisors (see below), whose sum is σ = 1846620720000. Its totient is φ = 221383141920.

The previous prime is 664466442259. The next prime is 664466442331. The reversal of 664466442264 is 462244664466.

664466442264 is a `hidden beast` number, since 6 + 64 + 46 + 64 + 422 + 64 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 664466442264.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279402 + ... + 1186169.

It is an arithmetic number, because the mean of its divisors is an integer number (28853448750).

Almost surely, 2^664466442264 is an apocalyptic number.

It is an amenable number.

664466442264 is an abundant number, since it is smaller than the sum of its proper divisors (1182154277736).

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

664466442264 is a wasteful number, since it uses less digits than its factorization.

664466442264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467685 (or 1467675 counting only the distinct ones).

The product of its digits is 31850496, while the sum is 54.

The spelling of 664466442264 in words is "six hundred sixty-four billion, four hundred sixty-six million, four hundred forty-two thousand, two hundred sixty-four".