669817027 has 8 divisors (see below), whose sum is σ = 742689072. Its totient is φ = 598941600.

The previous prime is 669817019. The next prime is 669817033. The reversal of 669817027 is 720718966.

It is a happy number.

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 669817027 - 2³ = 669817019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669817087) 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, 498448 + ... + 499789.

It is an arithmetic number, because the mean of its divisors is an integer number (92836134).

Almost surely, 2^669817027 is an apocalyptic number.

669817027 is a deficient number, since it is larger than the sum of its proper divisors (72872045).

669817027 is a wasteful number, since it uses less digits than its factorization.

669817027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998309.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 669817027 is about 25880.8235379016. The cubic root of 669817027 is about 874.9543495095.

The spelling of 669817027 in words is "six hundred sixty-nine million, eight hundred seventeen thousand, twenty-seven".