669929159 has 4 divisors (see below), whose sum is σ = 673671960. Its totient is φ = 666186360.

The previous prime is 669929131. The next prime is 669929171. The reversal of 669929159 is 951929966.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669929159 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 (669929459) 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 in 3 ways as a sum of consecutive naturals, for example, 1871132 + ... + 1871489.

It is an arithmetic number, because the mean of its divisors is an integer number (168417990).

Almost surely, 2^669929159 is an apocalyptic number.

669929159 is a deficient number, since it is larger than the sum of its proper divisors (3742801).

669929159 is a wasteful number, since it uses less digits than its factorization.

669929159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3742800.

The product of its digits is 2361960, while the sum is 56.

The square root of 669929159 is about 25882.9897616176. The cubic root of 669929159 is about 875.0031712538.

The spelling of 669929159 in words is "six hundred sixty-nine million, nine hundred twenty-nine thousand, one hundred fifty-nine".