6665107513 has 2 divisors, whose sum is σ = 6665107514. Its totient is φ = 6665107512.

The previous prime is 6665107469. The next prime is 6665107523. The reversal of 6665107513 is 3157015666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6646814784 + 18292729 = 81528^2 + 4277^2 .

It is a cyclic number.

It is not a de Polignac number, because 6665107513 - 2²⁵ = 6631553081 is a prime.

It is not a weakly prime, because it can be changed into another prime (6665107523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332553756 + 3332553757.

It is an arithmetic number, because the mean of its divisors is an integer number (3332553757).

Almost surely, 2^6665107513 is an apocalyptic number.

It is an amenable number.

6665107513 is a deficient number, since it is larger than the sum of its proper divisors (1).

6665107513 is an equidigital number, since it uses as much as digits as its factorization.

6665107513 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 6665107513 is about 81640.1097071776. The cubic root of 6665107513 is about 1881.9253243450.

The spelling of 6665107513 in words is "six billion, six hundred sixty-five million, one hundred seven thousand, five hundred thirteen".