665410488607 has 4 divisors (see below), whose sum is σ = 694341379440. Its totient is φ = 636479597776.

The previous prime is 665410488593. The next prime is 665410488641. The reversal of 665410488607 is 706884014566.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665410488607 is a prime.

It is a super-2 number, since 2×665410488607² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665410488697) 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, 14465445382 + ... + 14465445427.

It is an arithmetic number, because the mean of its divisors is an integer number (173585344860).

Almost surely, 2^665410488607 is an apocalyptic number.

665410488607 is a deficient number, since it is larger than the sum of its proper divisors (28930890833).

665410488607 is a wasteful number, since it uses less digits than its factorization.

665410488607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28930890832.

The product of its (nonzero) digits is 7741440, while the sum is 55.

The spelling of 665410488607 in words is "six hundred sixty-five billion, four hundred ten million, four hundred eighty-eight thousand, six hundred seven".