669807207 has 6 divisors (see below), whose sum is σ = 967499312. Its totient is φ = 446538132.

The previous prime is 669807169. The next prime is 669807217. The reversal of 669807207 is 702708966.

It is a happy number.

It is not a de Polignac number, because 669807207 - 2¹¹ = 669805159 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 (669807217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37211503 + ... + 37211520.

Almost surely, 2^669807207 is an apocalyptic number.

669807207 is a deficient number, since it is larger than the sum of its proper divisors (297692105).

669807207 is a wasteful number, since it uses less digits than its factorization.

669807207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74423029 (or 74423026 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 669807207 is about 25880.6338214504. The cubic root of 669807207 is about 874.9500736683.

The spelling of 669807207 in words is "six hundred sixty-nine million, eight hundred seven thousand, two hundred seven".