666431464154313 has 32 divisors (see below), whose sum is σ = 1044493255249920. Its totient is φ = 372624276824640.

The previous prime is 666431464154299. The next prime is 666431464154341. The reversal of 666431464154313 is 313451464134666.

It is a happy number.

It is not a de Polignac number, because 666431464154313 - 2¹² = 666431464150217 is a prime.

It is a super-2 number, since 2×666431464154313² (a number of 30 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (666431464154363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 425288503 + ... + 426852636.

It is an arithmetic number, because the mean of its divisors is an integer number (32640414226560).

Almost surely, 2^{666431464154313} is an apocalyptic number.

It is an amenable number.

666431464154313 is a deficient number, since it is larger than the sum of its proper divisors (378061791095607).

666431464154313 is a wasteful number, since it uses less digits than its factorization.

666431464154313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852142989.

The product of its digits is 44789760, while the sum is 57.

The spelling of 666431464154313 in words is "six hundred sixty-six trillion, four hundred thirty-one billion, four hundred sixty-four million, one hundred fifty-four thousand, three hundred thirteen".