331665464 has 32 divisors (see below), whose sum is σ = 683968320. Its totient is φ = 149817216.

The previous prime is 331665449. The next prime is 331665469. The reversal of 331665464 is 464566133.

It is a super-2 number, since 2×331665464² = 220003960020670592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331665469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29039 + ... + 38814.

It is an arithmetic number, because the mean of its divisors is an integer number (21374010).

Almost surely, 2^331665464 is an apocalyptic number.

It is an amenable number.

331665464 is an abundant number, since it is smaller than the sum of its proper divisors (352302856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

331665464 is a wasteful number, since it uses less digits than its factorization.

331665464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67919 (or 67915 counting only the distinct ones).

The product of its digits is 155520, while the sum is 38.

The square root of 331665464 is about 18211.6848204662. The cubic root of 331665464 is about 692.2029041805.

The spelling of 331665464 in words is "three hundred thirty-one million, six hundred sixty-five thousand, four hundred sixty-four".