669885599 has 2 divisors, whose sum is σ = 669885600. Its totient is φ = 669885598.

The previous prime is 669885577. The next prime is 669885701. The reversal of 669885599 is 995588966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 669885599 - 2⁸ = 669885343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669885509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334942799 + 334942800.

It is an arithmetic number, because the mean of its divisors is an integer number (334942800).

Almost surely, 2^669885599 is an apocalyptic number.

669885599 is a deficient number, since it is larger than the sum of its proper divisors (1).

669885599 is an equidigital number, since it uses as much as digits as its factorization.

669885599 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41990400, while the sum is 65.

The square root of 669885599 is about 25882.1482686426. The cubic root of 669885599 is about 874.9842060823.

The spelling of 669885599 in words is "six hundred sixty-nine million, eight hundred eighty-five thousand, five hundred ninety-nine".