331664468 has 6 divisors (see below), whose sum is σ = 580412826. Its totient is φ = 165832232.

The previous prime is 331664467. The next prime is 331664521. The reversal of 331664468 is 864466133.

It can be written as a sum of positive squares in only one way, i.e., 310393924 + 21270544 = 17618^2 + 4612^2 .

It is a super-2 number, since 2×331664468² = 220002638667446048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331664467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41458055 + ... + 41458062.

It is an arithmetic number, because the mean of its divisors is an integer number (96735471).

Almost surely, 2^331664468 is an apocalyptic number.

It is an amenable number.

331664468 is a deficient number, since it is larger than the sum of its proper divisors (248748358).

331664468 is a wasteful number, since it uses less digits than its factorization.

331664468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82916121 (or 82916119 counting only the distinct ones).

The product of its digits is 248832, while the sum is 41.

The square root of 331664468 is about 18211.6574753645. The cubic root of 331664468 is about 692.2022112787.

The spelling of 331664468 in words is "three hundred thirty-one million, six hundred sixty-four thousand, four hundred sixty-eight".