665170884643 has 8 divisors (see below), whose sum is σ = 673286977440. Its totient is φ = 657084796800.

The previous prime is 665170884629. The next prime is 665170884659. The reversal of 665170884643 is 346488071566.

665170884643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-665170884643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665170884673) 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, 7456630 + ... + 7545307.

It is an arithmetic number, because the mean of its divisors is an integer number (84160872180).

Almost surely, 2^665170884643 is an apocalyptic number.

665170884643 is a deficient number, since it is larger than the sum of its proper divisors (8116092797).

665170884643 is a wasteful number, since it uses less digits than its factorization.

665170884643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15002477.

The product of its (nonzero) digits is 23224320, while the sum is 58.

The spelling of 665170884643 in words is "six hundred sixty-five billion, one hundred seventy million, eight hundred eighty-four thousand, six hundred forty-three".