664463294 has 8 divisors (see below), whose sum is σ = 1087303608. Its totient is φ = 302028760.

The previous prime is 664463281. The next prime is 664463323. The reversal of 664463294 is 492364466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×664463294² = 883022938146660872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15101417 + ... + 15101460.

It is an arithmetic number, because the mean of its divisors is an integer number (135912951).

Almost surely, 2^664463294 is an apocalyptic number.

664463294 is a deficient number, since it is larger than the sum of its proper divisors (422840314).

664463294 is a wasteful number, since it uses less digits than its factorization.

664463294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30202890.

The product of its digits is 746496, while the sum is 44.

The square root of 664463294 is about 25777.1855329475. The cubic root of 664463294 is about 872.6169908503.

The spelling of 664463294 in words is "six hundred sixty-four million, four hundred sixty-three thousand, two hundred ninety-four".