331365661 has 8 divisors (see below), whose sum is σ = 361684224. Its totient is φ = 301079520.

The previous prime is 331365659. The next prime is 331365667. The reversal of 331365661 is 166563133.

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 331365661 - 2¹ = 331365659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331365667) 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, 16545 + ... + 30601.

It is an arithmetic number, because the mean of its divisors is an integer number (45210528).

Almost surely, 2^331365661 is an apocalyptic number.

It is an amenable number.

331365661 is a deficient number, since it is larger than the sum of its proper divisors (30318563).

331365661 is a wasteful number, since it uses less digits than its factorization.

331365661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16211.

The product of its digits is 29160, while the sum is 34.

The square root of 331365661 is about 18203.4518979231. The cubic root of 331365661 is about 691.9942732049.

The spelling of 331365661 in words is "three hundred thirty-one million, three hundred sixty-five thousand, six hundred sixty-one".