665714602490687 has 4 divisors (see below), whose sum is σ = 694658715642480. Its totient is φ = 636770489338896.

The previous prime is 665714602490671. The next prime is 665714602490741. The reversal of 665714602490687 is 786094206417566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 665714602490687 - 2⁴ = 665714602490671 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 665714602490687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665714602490627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14472056575862 + ... + 14472056575907.

It is an arithmetic number, because the mean of its divisors is an integer number (173664678910620).

Almost surely, 2^{665714602490687} is an apocalyptic number.

665714602490687 is a deficient number, since it is larger than the sum of its proper divisors (28944113151793).

665714602490687 is a wasteful number, since it uses less digits than its factorization.

665714602490687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28944113151792.

The product of its (nonzero) digits is 731566080, while the sum is 71.

The spelling of 665714602490687 in words is "six hundred sixty-five trillion, seven hundred fourteen billion, six hundred two million, four hundred ninety thousand, six hundred eighty-seven".