664464942 has 48 divisors (see below), whose sum is σ = 1478917440. Its totient is φ = 215481600.

The previous prime is 664464919. The next prime is 664464947. The reversal of 664464942 is 249464466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664464947) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 317034 + ... + 319122.

It is an arithmetic number, because the mean of its divisors is an integer number (30810780).

Almost surely, 2^664464942 is an apocalyptic number.

664464942 is an abundant number, since it is smaller than the sum of its proper divisors (814452498).

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

664464942 is a wasteful number, since it uses less digits than its factorization.

664464942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2569 (or 2566 counting only the distinct ones).

The product of its digits is 995328, while the sum is 45.

The square root of 664464942 is about 25777.2174991794. The cubic root of 664464942 is about 872.6177122705.

The spelling of 664464942 in words is "six hundred sixty-four million, four hundred sixty-four thousand, nine hundred forty-two".