669840675 has 48 divisors (see below), whose sum is σ = 1274323200. Its totient is φ = 304122240.

The previous prime is 669840667. The next prime is 669840679. The reversal of 669840675 is 576048966.

It is not a de Polignac number, because 669840675 - 2³ = 669840667 is a prime.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (669840679) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73944 + ... + 82506.

It is an arithmetic number, because the mean of its divisors is an integer number (26548400).

Almost surely, 2^669840675 is an apocalyptic number.

669840675 is a deficient number, since it is larger than the sum of its proper divisors (604482525).

669840675 is a wasteful number, since it uses less digits than its factorization.

669840675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8732 (or 8727 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 51.

The square root of 669840675 is about 25881.2803972292. The cubic root of 669840675 is about 874.9646461906.

The spelling of 669840675 in words is "six hundred sixty-nine million, eight hundred forty thousand, six hundred seventy-five".