669650407 has 8 divisors (see below), whose sum is σ = 684711936. Its totient is φ = 654622872.

The previous prime is 669650369. The next prime is 669650411. The reversal of 669650407 is 704056966.

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 669650407 - 2⁷ = 669650279 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 (669651407) 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, 33658 + ... + 49720.

It is an arithmetic number, because the mean of its divisors is an integer number (85588992).

Almost surely, 2^669650407 is an apocalyptic number.

669650407 is a deficient number, since it is larger than the sum of its proper divisors (15061529).

669650407 is a wasteful number, since it uses less digits than its factorization.

669650407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16997.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 669650407 is about 25877.6043520261. The cubic root of 669650407 is about 874.8817938823.

The spelling of 669650407 in words is "six hundred sixty-nine million, six hundred fifty thousand, four hundred seven".