331408661 has 8 divisors (see below), whose sum is σ = 335349504. Its totient is φ = 327491440.

The previous prime is 331408657. The next prime is 331408663. The reversal of 331408661 is 166804133.

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

It is a cyclic number.

It is not a de Polignac number, because 331408661 - 2² = 331408657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331408663) 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 in 7 ways as a sum of consecutive naturals, for example, 23156 + ... + 34626.

It is an arithmetic number, because the mean of its divisors is an integer number (41918688).

Almost surely, 2^331408661 is an apocalyptic number.

It is an amenable number.

331408661 is a deficient number, since it is larger than the sum of its proper divisors (3940843).

331408661 is a wasteful number, since it uses less digits than its factorization.

331408661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11811.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 331408661 is about 18204.6329542784. The cubic root of 331408661 is about 692.0242043557.

The spelling of 331408661 in words is "three hundred thirty-one million, four hundred eight thousand, six hundred sixty-one".