664772734 has 8 divisors (see below), whose sum is σ = 997283088. Its totient is φ = 332345040.

The previous prime is 664772723. The next prime is 664772753. The reversal of 664772734 is 437277466.

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

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, 6679 + ... + 37069.

It is an arithmetic number, because the mean of its divisors is an integer number (124660386).

Almost surely, 2^664772734 is an apocalyptic number.

664772734 is a deficient number, since it is larger than the sum of its proper divisors (332510354).

664772734 is a wasteful number, since it uses less digits than its factorization.

664772734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41330.

The product of its digits is 1185408, while the sum is 46.

The square root of 664772734 is about 25783.1870411708. The cubic root of 664772734 is about 872.7524288289.

The spelling of 664772734 in words is "six hundred sixty-four million, seven hundred seventy-two thousand, seven hundred thirty-four".