665061015 has 16 divisors (see below), whose sum is σ = 1066576896. Its totient is φ = 353872800.

The previous prime is 665060999. The next prime is 665061017. The reversal of 665061015 is 510160566.

It is not a de Polignac number, because 665061015 - 2⁴ = 665060999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665061017) 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, 44971 + ... + 57900.

It is an arithmetic number, because the mean of its divisors is an integer number (66661056).

Almost surely, 2^665061015 is an apocalyptic number.

665061015 is a deficient number, since it is larger than the sum of its proper divisors (401515881).

665061015 is a wasteful number, since it uses less digits than its factorization.

665061015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103310.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 665061015 is about 25788.7769194276. The cubic root of 665061015 is about 872.8785679689.

The spelling of 665061015 in words is "six hundred sixty-five million, sixty-one thousand, fifteen".