664562426 has 32 divisors (see below), whose sum is σ = 1116464256. Its totient is φ = 294120000.

The previous prime is 664562401. The next prime is 664562441. The reversal of 664562426 is 624265466.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133091 + ... + 137993.

It is an arithmetic number, because the mean of its divisors is an integer number (34889508).

Almost surely, 2^664562426 is an apocalyptic number.

664562426 is a deficient number, since it is larger than the sum of its proper divisors (451901830).

664562426 is a wasteful number, since it uses less digits than its factorization.

664562426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5078.

The product of its digits is 414720, while the sum is 41.

The square root of 664562426 is about 25779.1083243777. The cubic root of 664562426 is about 872.6603842511.

The spelling of 664562426 in words is "six hundred sixty-four million, five hundred sixty-two thousand, four hundred twenty-six".