664455704726370 has 64 divisors (see below), whose sum is σ = 1648245312645120. Its totient is φ = 171328850228928.

The previous prime is 664455704726353. The next prime is 664455704726399. The reversal of 664455704726370 is 73627407554466.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2838709360 + ... + 2838943419.

It is an arithmetic number, because the mean of its divisors is an integer number (25753833010080).

Almost surely, 2^{664455704726370} is an apocalyptic number.

664455704726370 is an abundant number, since it is smaller than the sum of its proper divisors (983789607918750).

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

664455704726370 is a wasteful number, since it uses less digits than its factorization.

664455704726370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5677652919.

The product of its (nonzero) digits is 711244800, while the sum is 66.

The spelling of 664455704726370 in words is "six hundred sixty-four trillion, four hundred fifty-five billion, seven hundred four million, seven hundred twenty-six thousand, three hundred seventy".