669272194 has 8 divisors (see below), whose sum is σ = 1008292860. Its totient is φ = 333174576.

The previous prime is 669272189. The next prime is 669272203. The reversal of 669272194 is 491272966.

It can be written as a sum of positive squares in 2 ways, for example, as 647040969 + 22231225 = 25437^2 + 4715^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 730189 + ... + 731104.

Almost surely, 2^669272194 is an apocalyptic number.

669272194 is a deficient number, since it is larger than the sum of its proper divisors (339020666).

669272194 is a wasteful number, since it uses less digits than its factorization.

669272194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461524.

The product of its digits is 326592, while the sum is 46.

The square root of 669272194 is about 25870.2955916627. The cubic root of 669272194 is about 874.7170542017.

The spelling of 669272194 in words is "six hundred sixty-nine million, two hundred seventy-two thousand, one hundred ninety-four".