665107652875 has 16 divisors (see below), whose sum is σ = 850299585408. Its totient is φ = 519108408000.

The previous prime is 665107652873. The next prime is 665107652927. The reversal of 665107652875 is 578256701566.

It is not a de Polignac number, because 665107652875 - 2¹ = 665107652873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665107652873) 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, 64883427 + ... + 64893676.

It is an arithmetic number, because the mean of its divisors is an integer number (53143724088).

Almost surely, 2^665107652875 is an apocalyptic number.

665107652875 is a deficient number, since it is larger than the sum of its proper divisors (185191932533).

665107652875 is a wasteful number, since it uses less digits than its factorization.

665107652875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129777159 (or 129777149 counting only the distinct ones).

The product of its (nonzero) digits is 21168000, while the sum is 58.

The spelling of 665107652875 in words is "six hundred sixty-five billion, one hundred seven million, six hundred fifty-two thousand, eight hundred seventy-five".