665165015 has 16 divisors (see below), whose sum is σ = 841451520. Its totient is φ = 503379360.

The previous prime is 665164957. The next prime is 665165029. The reversal of 665165015 is 510561566.

It is not a de Polignac number, because 665165015 - 2²⁴ = 648387799 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64250 + ... + 73880.

It is an arithmetic number, because the mean of its divisors is an integer number (52590720).

Almost surely, 2^665165015 is an apocalyptic number.

665165015 is a deficient number, since it is larger than the sum of its proper divisors (176286505).

665165015 is a wasteful number, since it uses less digits than its factorization.

665165015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10382.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 665165015 is about 25790.7932216130. The cubic root of 665165015 is about 872.9240648669.

The spelling of 665165015 in words is "six hundred sixty-five million, one hundred sixty-five thousand, fifteen".