665071995 has 16 divisors (see below), whose sum is σ = 1216131840. Its totient is φ = 304032864.

The previous prime is 665071987. The next prime is 665071999. The reversal of 665071995 is 599170566.

It is not a de Polignac number, because 665071995 - 2³ = 665071987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665071999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3166905 + ... + 3167114.

It is an arithmetic number, because the mean of its divisors is an integer number (76008240).

Almost surely, 2^665071995 is an apocalyptic number.

665071995 is a deficient number, since it is larger than the sum of its proper divisors (551059845).

665071995 is a wasteful number, since it uses less digits than its factorization.

665071995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6334034.

The product of its (nonzero) digits is 510300, while the sum is 48.

The square root of 665071995 is about 25788.9898018515. The cubic root of 665071995 is about 872.8833716153.

The spelling of 665071995 in words is "six hundred sixty-five million, seventy-one thousand, nine hundred ninety-five".