665493682495 has 32 divisors (see below), whose sum is σ = 835948707840. Its totient is φ = 507979019520.

The previous prime is 665493682489. The next prime is 665493682501. The reversal of 665493682495 is 594286394566.

It is an interprime number because it is at equal distance from previous prime (665493682489) and next prime (665493682501).

It is not a de Polignac number, because 665493682495 - 2¹³ = 665493674303 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665493682495.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36866562 + ... + 36884608.

It is an arithmetic number, because the mean of its divisors is an integer number (26123397120).

Almost surely, 2^665493682495 is an apocalyptic number.

665493682495 is a deficient number, since it is larger than the sum of its proper divisors (170455025345).

665493682495 is a wasteful number, since it uses less digits than its factorization.

665493682495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21415.

The product of its digits is 335923200, while the sum is 67.

The spelling of 665493682495 in words is "six hundred sixty-five billion, four hundred ninety-three million, six hundred eighty-two thousand, four hundred ninety-five".