669279031 has 8 divisors (see below), whose sum is σ = 676540080. Its totient is φ = 662057472.

The previous prime is 669279029. The next prime is 669279041. The reversal of 669279031 is 130972966.

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

It is a cyclic number.

It is not a de Polignac number, because 669279031 - 2¹ = 669279029 is a prime.

It is a super-2 number, since 2×669279031² = 895868842672597922, 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 (669279041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24861 + ... + 44233.

It is an arithmetic number, because the mean of its divisors is an integer number (84567510).

Almost surely, 2^669279031 is an apocalyptic number.

669279031 is a deficient number, since it is larger than the sum of its proper divisors (7261049).

669279031 is a wasteful number, since it uses less digits than its factorization.

669279031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19745.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 669279031 is about 25870.4277312920. The cubic root of 669279031 is about 874.7200327707.

The spelling of 669279031 in words is "six hundred sixty-nine million, two hundred seventy-nine thousand, thirty-one".