669636613 has 8 divisors (see below), whose sum is σ = 717571008. Its totient is φ = 622651584.

The previous prime is 669636587. The next prime is 669636631. The reversal of 669636613 is 316636966.

It is a happy number.

669636613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669636613 is a prime.

It is a super-2 number, since 2×669636613² = 896826386940223538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669636413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235881 + ... + 238702.

It is an arithmetic number, because the mean of its divisors is an integer number (89696376).

Almost surely, 2^669636613 is an apocalyptic number.

It is an amenable number.

669636613 is a deficient number, since it is larger than the sum of its proper divisors (47934395).

669636613 is a wasteful number, since it uses less digits than its factorization.

669636613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474683.

The product of its digits is 629856, while the sum is 46.

The square root of 669636613 is about 25877.3378267549. The cubic root of 669636613 is about 874.8757866671.

The spelling of 669636613 in words is "six hundred sixty-nine million, six hundred thirty-six thousand, six hundred thirteen".