331889666 has 4 divisors (see below), whose sum is σ = 497834502. Its totient is φ = 165944832.

The previous prime is 331889653. The next prime is 331889669. The reversal of 331889666 is 666988133.

331889666 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 281266441 + 50623225 = 16771^2 + 7115^2 .

It is a super-2 number, since 2×331889666² = 220301500795183112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (331889669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82972415 + ... + 82972418.

Almost surely, 2^331889666 is an apocalyptic number.

331889666 is a deficient number, since it is larger than the sum of its proper divisors (165944836).

331889666 is a wasteful number, since it uses less digits than its factorization.

331889666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165944835.

The product of its digits is 1119744, while the sum is 50.

The square root of 331889666 is about 18217.8392242329. The cubic root of 331889666 is about 692.3588427551.

The spelling of 331889666 in words is "three hundred thirty-one million, eight hundred eighty-nine thousand, six hundred sixty-six".