331666404 has 24 divisors (see below), whose sum is σ = 790355328. Its totient is φ = 108203040.

The previous prime is 331666403. The next prime is 331666441. The reversal of 331666404 is 404666133.

It is a super-2 number, since 2×331666404² = 220005207084582432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (331666403) 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, 293467 + ... + 294594.

It is an arithmetic number, because the mean of its divisors is an integer number (32931472).

Almost surely, 2^331666404 is an apocalyptic number.

It is an amenable number.

331666404 is an abundant number, since it is smaller than the sum of its proper divisors (458688924).

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

331666404 is a wasteful number, since it uses less digits than its factorization.

331666404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588115 (or 588113 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 331666404 is about 18211.7106280547. The cubic root of 331666404 is about 692.2035581227.

The spelling of 331666404 in words is "three hundred thirty-one million, six hundred sixty-six thousand, four hundred four".