669718022 has 4 divisors (see below), whose sum is σ = 1004577036. Its totient is φ = 334859010.

The previous prime is 669717943. The next prime is 669718031. The reversal of 669718022 is 220817966.

669718022 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 220817966 = 2 ⋅110408983.

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, 167429504 + ... + 167429507.

It is an arithmetic number, because the mean of its divisors is an integer number (251144259).

Almost surely, 2^669718022 is an apocalyptic number.

669718022 is a deficient number, since it is larger than the sum of its proper divisors (334859014).

669718022 is a wasteful number, since it uses less digits than its factorization.

669718022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334859013.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 669718022 is about 25878.9107576034. The cubic root of 669718022 is about 874.9112386697.

The spelling of 669718022 in words is "six hundred sixty-nine million, seven hundred eighteen thousand, twenty-two".