664770432400 has 120 divisors (see below), whose sum is σ = 1625552565120. Its totient is φ = 261207098880.

The previous prime is 664770432397. The next prime is 664770432413. The reversal of 664770432400 is 4234077466.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6171807 + ... + 6278593.

It is an arithmetic number, because the mean of its divisors is an integer number (13546271376).

Almost surely, 2^664770432400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664770432400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (812776282560).

664770432400 is an abundant number, since it is smaller than the sum of its proper divisors (960782132720).

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

664770432400 is a wasteful number, since it uses less digits than its factorization.

664770432400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107081 (or 107070 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 43.

The spelling of 664770432400 in words is "six hundred sixty-four billion, seven hundred seventy million, four hundred thirty-two thousand, four hundred".