669493635 has 16 divisors (see below), whose sum is σ = 1071835296. Its totient is φ = 356848128.

The previous prime is 669493631. The next prime is 669493661. The reversal of 669493635 is 536394966.

It is a happy number.

It is not a de Polignac number, because 669493635 - 2² = 669493631 is a prime.

It is not an unprimeable number, because it can be changed into a prime (669493631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14097 + ... + 39213.

It is an arithmetic number, because the mean of its divisors is an integer number (66989706).

Almost surely, 2^669493635 is an apocalyptic number.

669493635 is a deficient number, since it is larger than the sum of its proper divisors (402341661).

669493635 is a wasteful number, since it uses less digits than its factorization.

669493635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26902.

The product of its digits is 3149280, while the sum is 51.

The square root of 669493635 is about 25874.5750689746. The cubic root of 669493635 is about 874.8135156325.

The spelling of 669493635 in words is "six hundred sixty-nine million, four hundred ninety-three thousand, six hundred thirty-five".