664722332 has 6 divisors (see below), whose sum is σ = 1163264088. Its totient is φ = 332361164.

The previous prime is 664722323. The next prime is 664722341. The reversal of 664722332 is 233227466.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (664722323) and next prime (664722341).

It is a junction number, because it is equal to n+sod(n) for n = 664722292 and 664722301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83090288 + ... + 83090295.

It is an arithmetic number, because the mean of its divisors is an integer number (193877348).

Almost surely, 2^664722332 is an apocalyptic number.

It is an amenable number.

664722332 is a deficient number, since it is larger than the sum of its proper divisors (498541756).

664722332 is a wasteful number, since it uses less digits than its factorization.

664722332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166180587 (or 166180585 counting only the distinct ones).

The product of its digits is 72576, while the sum is 35.

The square root of 664722332 is about 25782.2096027474. The cubic root of 664722332 is about 872.7303713760.

Adding to 664722332 its reverse (233227466), we get a palindrome (897949798).

The spelling of 664722332 in words is "six hundred sixty-four million, seven hundred twenty-two thousand, three hundred thirty-two".