331817145666 has 16 divisors (see below), whose sum is σ = 663720269184. Its totient is φ = 110591385584.

The previous prime is 331817145661. The next prime is 331817145697. The reversal of 331817145666 is 666541718133.

It is a super-2 number, since 2×331817145666² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (331817145661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3532185 + ... + 3624908.

It is an arithmetic number, because the mean of its divisors is an integer number (41482516824).

Almost surely, 2^331817145666 is an apocalyptic number.

331817145666 is an abundant number, since it is smaller than the sum of its proper divisors (331903123518).

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

331817145666 is a wasteful number, since it uses less digits than its factorization.

331817145666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7164825.

The product of its digits is 2177280, while the sum is 51.

The spelling of 331817145666 in words is "three hundred thirty-one billion, eight hundred seventeen million, one hundred forty-five thousand, six hundred sixty-six".