665445777115 has 32 divisors (see below), whose sum is σ = 928340766720. Its totient is φ = 448445328000.

The previous prime is 665445777067. The next prime is 665445777137. The reversal of 665445777115 is 511777544566.

It is not a de Polignac number, because 665445777115 - 2¹⁵ = 665445744347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665445777115.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7599030 + ... + 7686100.

It is an arithmetic number, because the mean of its divisors is an integer number (29010648960).

Almost surely, 2^665445777115 is an apocalyptic number.

665445777115 is a deficient number, since it is larger than the sum of its proper divisors (262894989605).

665445777115 is a wasteful number, since it uses less digits than its factorization.

665445777115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90843.

The product of its digits is 24696000, while the sum is 58.

The spelling of 665445777115 in words is "six hundred sixty-five billion, four hundred forty-five million, seven hundred seventy-seven thousand, one hundred fifteen".