669637117 has 4 divisors (see below), whose sum is σ = 671534460. Its totient is φ = 667739776.

The previous prime is 669637109. The next prime is 669637181. The reversal of 669637117 is 711736966.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 300190276 + 369446841 = 17326^2 + 19221^2 .

It is a cyclic number.

It is not a de Polignac number, because 669637117 - 2³ = 669637109 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 (669637217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 948142 + ... + 948847.

It is an arithmetic number, because the mean of its divisors is an integer number (167883615).

Almost surely, 2^669637117 is an apocalyptic number.

It is an amenable number.

669637117 is a deficient number, since it is larger than the sum of its proper divisors (1897343).

669637117 is a wasteful number, since it uses less digits than its factorization.

669637117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897342.

The product of its digits is 285768, while the sum is 46.

The square root of 669637117 is about 25877.3475650036. The cubic root of 669637117 is about 874.8760061579.

The spelling of 669637117 in words is "six hundred sixty-nine million, six hundred thirty-seven thousand, one hundred seventeen".