669429079 has 4 divisors (see below), whose sum is σ = 730286280. Its totient is φ = 608571880.

The previous prime is 669429041. The next prime is 669429121. The reversal of 669429079 is 970924966.

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

It is a cyclic number.

It is not a de Polignac number, because 669429079 - 2⁷ = 669428951 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 (669429029) 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, 30428584 + ... + 30428605.

It is an arithmetic number, because the mean of its divisors is an integer number (182571570).

Almost surely, 2^669429079 is an apocalyptic number.

669429079 is a deficient number, since it is larger than the sum of its proper divisors (60857201).

669429079 is a wasteful number, since it uses less digits than its factorization.

669429079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60857200.

The product of its (nonzero) digits is 1469664, while the sum is 52.

The square root of 669429079 is about 25873.3275594772. The cubic root of 669429079 is about 874.7853967311.

The spelling of 669429079 in words is "six hundred sixty-nine million, four hundred twenty-nine thousand, seventy-nine".