664580427140 has 72 divisors (see below), whose sum is σ = 1694060972352. Its totient is φ = 217949350080.

The previous prime is 664580427139. The next prime is 664580427229. The reversal of 664580427140 is 41724085466.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14719706 + ... + 14764785.

It is an arithmetic number, because the mean of its divisors is an integer number (23528624616).

Almost surely, 2^664580427140 is an apocalyptic number.

It is an amenable number.

664580427140 is an abundant number, since it is smaller than the sum of its proper divisors (1029480545212).

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

664580427140 is a wasteful number, since it uses less digits than its factorization.

664580427140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29484537 (or 29484528 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 47.

The spelling of 664580427140 in words is "six hundred sixty-four billion, five hundred eighty million, four hundred twenty-seven thousand, one hundred forty".