664353446 has 4 divisors (see below), whose sum is σ = 996530172. Its totient is φ = 332176722.

The previous prime is 664353433. The next prime is 664353479. The reversal of 664353446 is 644353466.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166088360 + ... + 166088363.

It is an arithmetic number, because the mean of its divisors is an integer number (249132543).

Almost surely, 2^664353446 is an apocalyptic number.

664353446 is a deficient number, since it is larger than the sum of its proper divisors (332176726).

664353446 is a wasteful number, since it uses less digits than its factorization.

664353446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332176725.

The product of its digits is 622080, while the sum is 41.

The square root of 664353446 is about 25775.0547235113. The cubic root of 664353446 is about 872.5689016558.

The spelling of 664353446 in words is "six hundred sixty-four million, three hundred fifty-three thousand, four hundred forty-six".