669390905167 has 4 divisors (see below), whose sum is σ = 669649260096. Its totient is φ = 669132550240.

The previous prime is 669390905153. The next prime is 669390905233. The reversal of 669390905167 is 761509093966.

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

It is a cyclic number.

It is not a de Polignac number, because 669390905167 - 2³⁵ = 635031166799 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 (669390905147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129173578 + ... + 129178759.

It is an arithmetic number, because the mean of its divisors is an integer number (167412315024).

Almost surely, 2^669390905167 is an apocalyptic number.

669390905167 is a deficient number, since it is larger than the sum of its proper divisors (258354929).

669390905167 is a wasteful number, since it uses less digits than its factorization.

669390905167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258354928.

The product of its (nonzero) digits is 16533720, while the sum is 61.

The spelling of 669390905167 in words is "six hundred sixty-nine billion, three hundred ninety million, nine hundred five thousand, one hundred sixty-seven".