664706822 has 8 divisors (see below), whose sum is σ = 1073757216. Its totient is φ = 306787752.

The previous prime is 664706821. The next prime is 664706837. The reversal of 664706822 is 228607466.

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

It is a self number, because there is not a number n which added to its sum of digits gives 664706822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664706821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12782798 + ... + 12782849.

It is an arithmetic number, because the mean of its divisors is an integer number (134219652).

Almost surely, 2^664706822 is an apocalyptic number.

664706822 is a deficient number, since it is larger than the sum of its proper divisors (409050394).

664706822 is a wasteful number, since it uses less digits than its factorization.

664706822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25565662.

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 664706822 is about 25781.9088121884. The cubic root of 664706822 is about 872.7235835025.

The spelling of 664706822 in words is "six hundred sixty-four million, seven hundred six thousand, eight hundred twenty-two".