669474361 has 4 divisors (see below), whose sum is σ = 677948800. Its totient is φ = 660999924.

The previous prime is 669474343. The next prime is 669474391. The reversal of 669474361 is 163474966.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 669474361 - 2¹⁵ = 669441593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669474301) 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, 4237101 + ... + 4237258.

It is an arithmetic number, because the mean of its divisors is an integer number (169487200).

Almost surely, 2^669474361 is an apocalyptic number.

It is an amenable number.

669474361 is a deficient number, since it is larger than the sum of its proper divisors (8474439).

669474361 is an equidigital number, since it uses as much as digits as its factorization.

669474361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8474438.

The product of its digits is 653184, while the sum is 46.

The square root of 669474361 is about 25874.2026157329. The cubic root of 669474361 is about 874.8051205726.

The spelling of 669474361 in words is "six hundred sixty-nine million, four hundred seventy-four thousand, three hundred sixty-one".