669649179 has 16 divisors (see below), whose sum is σ = 924721920. Its totient is φ = 430540320.

The previous prime is 669649157. The next prime is 669649207. The reversal of 669649179 is 971946966.

669649179 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 669649179 - 2⁵ = 669649147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (669649579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80514 + ... + 88440.

It is an arithmetic number, because the mean of its divisors is an integer number (57795120).

Almost surely, 2^669649179 is an apocalyptic number.

669649179 is a deficient number, since it is larger than the sum of its proper divisors (255072741).

669649179 is a wasteful number, since it uses less digits than its factorization.

669649179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8930.

The product of its digits is 4408992, while the sum is 57.

The square root of 669649179 is about 25877.5806249348. The cubic root of 669649179 is about 874.8812590980.

The spelling of 669649179 in words is "six hundred sixty-nine million, six hundred forty-nine thousand, one hundred seventy-nine".