665006165515 has 8 divisors (see below), whose sum is σ = 799533228528. Its totient is φ = 530987712480.

The previous prime is 665006165513. The next prime is 665006165569. The reversal of 665006165515 is 515561600566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 665006165515 - 2¹ = 665006165513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665006165513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127149616 + ... + 127154845.

It is an arithmetic number, because the mean of its divisors is an integer number (99941653566).

Almost surely, 2^665006165515 is an apocalyptic number.

665006165515 is a deficient number, since it is larger than the sum of its proper divisors (134527063013).

665006165515 is a wasteful number, since it uses less digits than its factorization.

665006165515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254304989.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 665006165515 in words is "six hundred sixty-five billion, six million, one hundred sixty-five thousand, five hundred fifteen".