665016506715 has 32 divisors (see below), whose sum is σ = 1161241837056. Its totient is φ = 322297314560.

The previous prime is 665016506711. The next prime is 665016506729. The reversal of 665016506715 is 517605610566.

665016506715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 665016506715 - 2² = 665016506711 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665016506711) 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, 447279 + ... + 1236968.

It is an arithmetic number, because the mean of its divisors is an integer number (36288807408).

Almost surely, 2^665016506715 is an apocalyptic number.

665016506715 is a deficient number, since it is larger than the sum of its proper divisors (496225330341).

665016506715 is a wasteful number, since it uses less digits than its factorization.

665016506715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686659.

The product of its (nonzero) digits is 1134000, while the sum is 48.

The spelling of 665016506715 in words is "six hundred sixty-five billion, sixteen million, five hundred six thousand, seven hundred fifteen".