667245231 has 12 divisors (see below), whose sum is σ = 967208008. Its totient is φ = 443256624.

The previous prime is 667245199. The next prime is 667245283. The reversal of 667245231 is 132542766.

667245231 is a `hidden beast` number, since 66 + 72 + 4 + 523 + 1 = 666.

It is not a de Polignac number, because 667245231 - 2⁵ = 667245199 is a prime.

It is a super-2 number, since 2×667245231² = 890432396584486722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667245431) 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, 128440 + ... + 133533.

Almost surely, 2^667245231 is an apocalyptic number.

667245231 is a deficient number, since it is larger than the sum of its proper divisors (299962777).

667245231 is a wasteful number, since it uses less digits than its factorization.

667245231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262262 (or 262259 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 667245231 is about 25831.0903951033. The cubic root of 667245231 is about 873.8331029163.

Adding to 667245231 its reverse (132542766), we get a palindrome (799787997).

The spelling of 667245231 in words is "six hundred sixty-seven million, two hundred forty-five thousand, two hundred thirty-one".