665662630634131 has 32 divisors (see below), whose sum is σ = 747576292779008. Its totient is φ = 588757200514560.

The previous prime is 665662630634063. The next prime is 665662630634153. The reversal of 665662630634131 is 131436036266566.

It is a cyclic number.

It is not a de Polignac number, because 665662630634131 - 2¹³ = 665662630625939 is a prime.

It is a super-2 number, since 2×665662630634131² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665662630634171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27847851 + ... + 45900196.

It is an arithmetic number, because the mean of its divisors is an integer number (23361759149344).

Almost surely, 2^{665662630634131} is an apocalyptic number.

665662630634131 is a deficient number, since it is larger than the sum of its proper divisors (81913662144877).

665662630634131 is a wasteful number, since it uses less digits than its factorization.

665662630634131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73748411.

The product of its (nonzero) digits is 50388480, while the sum is 58.

The spelling of 665662630634131 in words is "six hundred sixty-five trillion, six hundred sixty-two billion, six hundred thirty million, six hundred thirty-four thousand, one hundred thirty-one".