666345065331 has 24 divisors (see below), whose sum is σ = 976623298560. Its totient is φ = 403824211120.

The previous prime is 666345065329. The next prime is 666345065357. The reversal of 666345065331 is 133560543666.

666345065331 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 666345065331 - 2¹ = 666345065329 is a prime.

It is a super-2 number, since 2×666345065331² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (666345065371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9373186 + ... + 9444008.

It is an arithmetic number, because the mean of its divisors is an integer number (40692637440).

Almost surely, 2^666345065331 is an apocalyptic number.

666345065331 is a deficient number, since it is larger than the sum of its proper divisors (310278233229).

666345065331 is a wasteful number, since it uses less digits than its factorization.

666345065331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96767 (or 96756 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 48.

The spelling of 666345065331 in words is "six hundred sixty-six billion, three hundred forty-five million, sixty-five thousand, three hundred thirty-one".