665880406036737 has 8 divisors (see below), whose sum is σ = 887844498277440. Its totient is φ = 443918292243600.

The previous prime is 665880406036697. The next prime is 665880406036787. The reversal of 665880406036737 is 737630604088566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 665880406036737 - 2⁶ = 665880406036673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665880406036787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 493826389 + ... + 495172962.

It is an arithmetic number, because the mean of its divisors is an integer number (110980562284680).

Almost surely, 2^{665880406036737} is an apocalyptic number.

It is an amenable number.

665880406036737 is a deficient number, since it is larger than the sum of its proper divisors (221964092240703).

665880406036737 is a wasteful number, since it uses less digits than its factorization.

665880406036737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989223783.

The product of its (nonzero) digits is 731566080, while the sum is 69.

The spelling of 665880406036737 in words is "six hundred sixty-five trillion, eight hundred eighty billion, four hundred six million, thirty-six thousand, seven hundred thirty-seven".