669599047 has 8 divisors (see below), whose sum is σ = 721718144. Its totient is φ = 617567328.

The previous prime is 669599011. The next prime is 669599057. The reversal of 669599047 is 740995966.

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-669599047 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 (669599057) 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, 5463 + ... + 37000.

It is an arithmetic number, because the mean of its divisors is an integer number (90214768).

Almost surely, 2^669599047 is an apocalyptic number.

669599047 is a deficient number, since it is larger than the sum of its proper divisors (52119097).

669599047 is a wasteful number, since it uses less digits than its factorization.

669599047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43689.

The product of its (nonzero) digits is 3674160, while the sum is 55.

The square root of 669599047 is about 25876.6119691122. The cubic root of 669599047 is about 874.8594264513.

The spelling of 669599047 in words is "six hundred sixty-nine million, five hundred ninety-nine thousand, forty-seven".