665669175359 has 8 divisors (see below), whose sum is σ = 669555707040. Its totient is φ = 661787770336.

The previous prime is 665669175337. The next prime is 665669175361. The reversal of 665669175359 is 953571966566.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 665669175359 - 2²⁸ = 665400739903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665669175959) 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, 1021064 + ... + 1540749.

It is an arithmetic number, because the mean of its divisors is an integer number (83694463380).

Almost surely, 2^665669175359 is an apocalyptic number.

665669175359 is a deficient number, since it is larger than the sum of its proper divisors (3886531681).

665669175359 is a wasteful number, since it uses less digits than its factorization.

665669175359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2563329.

The product of its digits is 275562000, while the sum is 68.

The spelling of 665669175359 in words is "six hundred sixty-five billion, six hundred sixty-nine million, one hundred seventy-five thousand, three hundred fifty-nine".