664402722 has 16 divisors (see below), whose sum is σ = 1329346080. Its totient is φ = 221377472.

The previous prime is 664402699. The next prime is 664402727. The reversal of 664402722 is 227204466.

It is not an unprimeable number, because it can be changed into a prime (664402727) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5568 + ... + 36875.

It is an arithmetic number, because the mean of its divisors is an integer number (83084130).

Almost surely, 2^664402722 is an apocalyptic number.

664402722 is an abundant number, since it is smaller than the sum of its proper divisors (664943358).

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

664402722 is a wasteful number, since it uses less digits than its factorization.

664402722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45057.

The product of its (nonzero) digits is 32256, while the sum is 33.

The square root of 664402722 is about 25776.0105912455. The cubic root of 664402722 is about 872.5904743304.

The spelling of 664402722 in words is "six hundred sixty-four million, four hundred two thousand, seven hundred twenty-two".