669276321 has 8 divisors (see below), whose sum is σ = 1019849664. Its totient is φ = 382443600.

The previous prime is 669276299. The next prime is 669276331. The reversal of 669276321 is 123672966.

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

It is not a de Polignac number, because 669276321 - 2¹⁴ = 669259937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (669276331) 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, 15935130 + ... + 15935171.

It is an arithmetic number, because the mean of its divisors is an integer number (127481208).

Almost surely, 2^669276321 is an apocalyptic number.

It is an amenable number.

669276321 is a deficient number, since it is larger than the sum of its proper divisors (350573343).

669276321 is a wasteful number, since it uses less digits than its factorization.

669276321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31870311.

The product of its digits is 163296, while the sum is 42.

The square root of 669276321 is about 25870.3753548340. The cubic root of 669276321 is about 874.7188521497.

The spelling of 669276321 in words is "six hundred sixty-nine million, two hundred seventy-six thousand, three hundred twenty-one".