664843427754 has 64 divisors (see below), whose sum is σ = 1478165096448. Its totient is φ = 197635880000.

The previous prime is 664843427749. The next prime is 664843427779. The reversal of 664843427754 is 457724348466.

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, 33651379 + ... + 33671129.

It is an arithmetic number, because the mean of its divisors is an integer number (23096329632).

Almost surely, 2^664843427754 is an apocalyptic number.

664843427754 is an abundant number, since it is smaller than the sum of its proper divisors (813321668694).

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

664843427754 is a wasteful number, since it uses less digits than its factorization.

664843427754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29443.

The product of its digits is 108380160, while the sum is 60.

The spelling of 664843427754 in words is "six hundred sixty-four billion, eight hundred forty-three million, four hundred twenty-seven thousand, seven hundred fifty-four".