669674641 has 8 divisors (see below), whose sum is σ = 693158400. Its totient is φ = 646217040.

The previous prime is 669674633. The next prime is 669674657. The reversal of 669674641 is 146476966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 669674641 - 2³ = 669674633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669674611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55750 + ... + 66688.

It is an arithmetic number, because the mean of its divisors is an integer number (86644800).

Almost surely, 2^669674641 is an apocalyptic number.

It is an amenable number.

669674641 is a deficient number, since it is larger than the sum of its proper divisors (23483759).

669674641 is a wasteful number, since it uses less digits than its factorization.

669674641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13079.

The product of its digits is 1306368, while the sum is 49.

The square root of 669674641 is about 25878.0725905157. The cubic root of 669674641 is about 874.8923474634.

The spelling of 669674641 in words is "six hundred sixty-nine million, six hundred seventy-four thousand, six hundred forty-one".