667454271 has 12 divisors (see below), whose sum is σ = 978197976. Its totient is φ = 404517520.

The previous prime is 667454243. The next prime is 667454279. The reversal of 667454271 is 172454766.

It is not a de Polignac number, because 667454271 - 2⁵ = 667454239 is a prime.

It is a super-2 number, since 2×667454271² = 890990407752282882, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667454279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 918996 + ... + 919721.

It is an arithmetic number, because the mean of its divisors is an integer number (81516498).

Almost surely, 2^667454271 is an apocalyptic number.

667454271 is a deficient number, since it is larger than the sum of its proper divisors (310743705).

667454271 is a wasteful number, since it uses less digits than its factorization.

667454271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1838742 (or 1838731 counting only the distinct ones).

The product of its digits is 282240, while the sum is 42.

The square root of 667454271 is about 25835.1363650359. The cubic root of 667454271 is about 873.9243472299.

The spelling of 667454271 in words is "six hundred sixty-seven million, four hundred fifty-four thousand, two hundred seventy-one".