331486661 has 4 divisors (see below), whose sum is σ = 361621824. Its totient is φ = 301351500.

The previous prime is 331486643. The next prime is 331486669. The reversal of 331486661 is 166684133.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 331486661 - 2¹⁴ = 331470277 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 (331486669) 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 3 ways as a sum of consecutive naturals, for example, 15067565 + ... + 15067586.

It is an arithmetic number, because the mean of its divisors is an integer number (90405456).

Almost surely, 2^331486661 is an apocalyptic number.

It is an amenable number.

331486661 is a deficient number, since it is larger than the sum of its proper divisors (30135163).

331486661 is a wasteful number, since it uses less digits than its factorization.

331486661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30135162.

The product of its digits is 62208, while the sum is 38.

The square root of 331486661 is about 18206.7751400406. The cubic root of 331486661 is about 692.0784914642.

The spelling of 331486661 in words is "three hundred thirty-one million, four hundred eighty-six thousand, six hundred sixty-one".