669891117286 has 4 divisors (see below), whose sum is σ = 1004836675932. Its totient is φ = 334945558642.

The previous prime is 669891117253. The next prime is 669891117347. The reversal of 669891117286 is 682711198966.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167472779320 + ... + 167472779323.

It is an arithmetic number, because the mean of its divisors is an integer number (251209168983).

Almost surely, 2^669891117286 is an apocalyptic number.

669891117286 is a deficient number, since it is larger than the sum of its proper divisors (334945558646).

669891117286 is a wasteful number, since it uses less digits than its factorization.

669891117286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334945558645.

The product of its digits is 15676416, while the sum is 64.

The spelling of 669891117286 in words is "six hundred sixty-nine billion, eight hundred ninety-one million, one hundred seventeen thousand, two hundred eighty-six".