669134399 has 16 divisors (see below), whose sum is σ = 724723200. Its totient is φ = 615475584.

The previous prime is 669134357. The next prime is 669134407. The reversal of 669134399 is 993431966.

It is a cyclic number.

It is not a de Polignac number, because 669134399 - 2¹² = 669130303 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 (669134339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177674 + ... + 181400.

It is an arithmetic number, because the mean of its divisors is an integer number (45295200).

Almost surely, 2^669134399 is an apocalyptic number.

669134399 is a deficient number, since it is larger than the sum of its proper divisors (55588801).

669134399 is a wasteful number, since it uses less digits than its factorization.

669134399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3982.

The product of its digits is 944784, while the sum is 50.

The square root of 669134399 is about 25867.6322650528. The cubic root of 669134399 is about 874.6570188825.

The spelling of 669134399 in words is "six hundred sixty-nine million, one hundred thirty-four thousand, three hundred ninety-nine".