664061152620 has 48 divisors (see below), whose sum is σ = 1957232874240. Its totient is φ = 167762817216.

The previous prime is 664061152609. The next prime is 664061152661. The reversal of 664061152620 is 26251160466.

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, 291253752 + ... + 291256031.

It is an arithmetic number, because the mean of its divisors is an integer number (40775684880).

Almost surely, 2^664061152620 is an apocalyptic number.

664061152620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

664061152620 is an abundant number, since it is smaller than the sum of its proper divisors (1293171721620).

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

664061152620 is a wasteful number, since it uses less digits than its factorization.

664061152620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582509814 (or 582509812 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 664061152620 in words is "six hundred sixty-four billion, sixty-one million, one hundred fifty-two thousand, six hundred twenty".