664722363 has 16 divisors (see below), whose sum is σ = 906425856. Its totient is φ = 433110240.

The previous prime is 664722347. The next prime is 664722419. The reversal of 664722363 is 363227466.

It is not a de Polignac number, because 664722363 - 2⁴ = 664722347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664722323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111445 + ... + 117257.

It is an arithmetic number, because the mean of its divisors is an integer number (56651616).

Almost surely, 2^664722363 is an apocalyptic number.

664722363 is a deficient number, since it is larger than the sum of its proper divisors (241703493).

664722363 is a wasteful number, since it uses less digits than its factorization.

664722363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6674.

The product of its digits is 217728, while the sum is 39.

The square root of 664722363 is about 25782.2102039371. The cubic root of 664722363 is about 872.7303849429.

The spelling of 664722363 in words is "six hundred sixty-four million, seven hundred twenty-two thousand, three hundred sixty-three".