669209763345 has 16 divisors (see below), whose sum is σ = 1074806865792. Its totient is φ = 355554792320.

The previous prime is 669209763323. The next prime is 669209763361. The reversal of 669209763345 is 543367902966.

It is not a de Polignac number, because 669209763345 - 2³⁶ = 600490286609 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84813516 + ... + 84821405.

It is an arithmetic number, because the mean of its divisors is an integer number (67175429112).

Almost surely, 2^669209763345 is an apocalyptic number.

It is an amenable number.

669209763345 is a deficient number, since it is larger than the sum of its proper divisors (405597102447).

669209763345 is a wasteful number, since it uses less digits than its factorization.

669209763345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169635192.

The product of its (nonzero) digits is 44089920, while the sum is 60.

The spelling of 669209763345 in words is "six hundred sixty-nine billion, two hundred nine million, seven hundred sixty-three thousand, three hundred forty-five".