665233641432671 has 8 divisors (see below), whose sum is σ = 700428627166320. Its totient is φ = 630056924580672.

The previous prime is 665233641432643. The next prime is 665233641432707. The reversal of 665233641432671 is 176234146332566.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665233641432671 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 665233641432671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665233641432611) 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, 4567145660 + ... + 4567291313.

It is an arithmetic number, because the mean of its divisors is an integer number (87553578395790).

Almost surely, 2^{665233641432671} is an apocalyptic number.

665233641432671 is a deficient number, since it is larger than the sum of its proper divisors (35194985733649).

665233641432671 is a wasteful number, since it uses less digits than its factorization.

665233641432671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9134440825.

The product of its digits is 78382080, while the sum is 59.

The spelling of 665233641432671 in words is "six hundred sixty-five trillion, two hundred thirty-three billion, six hundred forty-one million, four hundred thirty-two thousand, six hundred seventy-one".