664311426 has 32 divisors (see below), whose sum is σ = 1347098688. Its totient is φ = 218376960.

The previous prime is 664311413. The next prime is 664311433. The reversal of 664311426 is 624113466.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147366 + ... + 151806.

It is an arithmetic number, because the mean of its divisors is an integer number (42096834).

Almost surely, 2^664311426 is an apocalyptic number.

664311426 is an abundant number, since it is smaller than the sum of its proper divisors (682787262).

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

664311426 is a wasteful number, since it uses less digits than its factorization.

664311426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4786.

The product of its digits is 20736, while the sum is 33.

The square root of 664311426 is about 25774.2395814115. The cubic root of 664311426 is about 872.5505047625.

The spelling of 664311426 in words is "six hundred sixty-four million, three hundred eleven thousand, four hundred twenty-six".