669630271 has 12 divisors (see below), whose sum is σ = 709683832. Its totient is φ = 631469664.

The previous prime is 669630259. The next prime is 669630293. The reversal of 669630271 is 172036966.

It is not a de Polignac number, because 669630271 - 2⁵ = 669630239 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669633271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26905 + ... + 45421.

Almost surely, 2^669630271 is an apocalyptic number.

669630271 is a deficient number, since it is larger than the sum of its proper divisors (40053561).

669630271 is a wasteful number, since it uses less digits than its factorization.

669630271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18618 (or 18589 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 669630271 is about 25877.2152868117. The cubic root of 669630271 is about 874.8730247314.

The spelling of 669630271 in words is "six hundred sixty-nine million, six hundred thirty thousand, two hundred seventy-one".