665315107 has 2 divisors, whose sum is σ = 665315108. Its totient is φ = 665315106.

The previous prime is 665315041. The next prime is 665315117. The reversal of 665315107 is 701513566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665315107 - 2¹⁵ = 665282339 is a prime.

It is not a weakly prime, because it can be changed into another prime (665315117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332657553 + 332657554.

It is an arithmetic number, because the mean of its divisors is an integer number (332657554).

Almost surely, 2^665315107 is an apocalyptic number.

665315107 is a deficient number, since it is larger than the sum of its proper divisors (1).

665315107 is an equidigital number, since it uses as much as digits as its factorization.

665315107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 665315107 is about 25793.7028555421. The cubic root of 665315107 is about 872.9897172802.

The spelling of 665315107 in words is "six hundred sixty-five million, three hundred fifteen thousand, one hundred seven".