667733213 has 8 divisors (see below), whose sum is σ = 763722432. Its totient is φ = 571893696.

The previous prime is 667733161. The next prime is 667733221. The reversal of 667733213 is 312337766.

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

It is a cyclic number.

It is not a de Polignac number, because 667733213 - 2⁸ = 667732957 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667733233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27695 + ... + 45852.

It is an arithmetic number, because the mean of its divisors is an integer number (95465304).

Almost surely, 2^667733213 is an apocalyptic number.

It is an amenable number.

667733213 is a deficient number, since it is larger than the sum of its proper divisors (95989219).

667733213 is a wasteful number, since it uses less digits than its factorization.

667733213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74851.

The product of its digits is 95256, while the sum is 38.

The square root of 667733213 is about 25840.5343017516. The cubic root of 667733213 is about 874.0460735486.

The spelling of 667733213 in words is "six hundred sixty-seven million, seven hundred thirty-three thousand, two hundred thirteen".