664012553552 has 40 divisors (see below), whose sum is σ = 1385765352960. Its totient is φ = 307326983040.

The previous prime is 664012553549. The next prime is 664012553573. The reversal of 664012553552 is 255355210466.

It is a congruent number.

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, 29091527 + ... + 29114342.

It is an arithmetic number, because the mean of its divisors is an integer number (34644133824).

Almost surely, 2^664012553552 is an apocalyptic number.

664012553552 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

664012553552 is an abundant number, since it is smaller than the sum of its proper divisors (721752799408).

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

664012553552 is a wasteful number, since it uses less digits than its factorization.

664012553552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58205931 (or 58205925 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 44.

The spelling of 664012553552 in words is "six hundred sixty-four billion, twelve million, five hundred fifty-three thousand, five hundred fifty-two".