665515005 has 32 divisors (see below), whose sum is σ = 1113336576. Its totient is φ = 338832384.

The previous prime is 665515003. The next prime is 665515007. The reversal of 665515005 is 500515566.

It is an interprime number because it is at equal distance from previous prime (665515003) and next prime (665515007).

It is not a de Polignac number, because 665515005 - 2¹ = 665515003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665515003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202959 + ... + 206211.

It is an arithmetic number, because the mean of its divisors is an integer number (34791768).

Almost surely, 2^665515005 is an apocalyptic number.

It is an amenable number.

665515005 is a deficient number, since it is larger than the sum of its proper divisors (447821571).

665515005 is a wasteful number, since it uses less digits than its factorization.

665515005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3877.

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 665515005 is about 25797.5775025486. The cubic root of 665515005 is about 873.0771402282.

The spelling of 665515005 in words is "six hundred sixty-five million, five hundred fifteen thousand, five".