6665107531 has 2 divisors, whose sum is σ = 6665107532. Its totient is φ = 6665107530.

The previous prime is 6665107523. The next prime is 6665107577. The reversal of 6665107531 is 1357015666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6665107531 - 2³ = 6665107523 is a prime.

It is a super-3 number, since 3×6665107531³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (6665102531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332553765 + 3332553766.

It is an arithmetic number, because the mean of its divisors is an integer number (3332553766).

Almost surely, 2^6665107531 is an apocalyptic number.

6665107531 is a deficient number, since it is larger than the sum of its proper divisors (1).

6665107531 is an equidigital number, since it uses as much as digits as its factorization.

6665107531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 6665107531 is about 81640.1098174176. The cubic root of 6665107531 is about 1881.9253260391.

It can be divided in two parts, 666510 and 7531, that added together give a square (674041 = 821²).

The spelling of 6665107531 in words is "six billion, six hundred sixty-five million, one hundred seven thousand, five hundred thirty-one".