667264213 has 12 divisors (see below), whose sum is σ = 846770112. Its totient is φ = 519945720.

The previous prime is 667264187. The next prime is 667264237. The reversal of 667264213 is 312462766.

It is not a de Polignac number, because 667264213 - 2¹³ = 667256021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667264513) 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, 618445 + ... + 619522.

It is an arithmetic number, because the mean of its divisors is an integer number (70564176).

Almost surely, 2^667264213 is an apocalyptic number.

It is an amenable number.

667264213 is a deficient number, since it is larger than the sum of its proper divisors (179505899).

667264213 is a wasteful number, since it uses less digits than its factorization.

667264213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237992 (or 1237985 counting only the distinct ones).

The product of its digits is 72576, while the sum is 37.

The square root of 667264213 is about 25831.4578179397. The cubic root of 667264213 is about 873.8413891964.

The spelling of 667264213 in words is "six hundred sixty-seven million, two hundred sixty-four thousand, two hundred thirteen".