667402213 has 8 divisors (see below), whose sum is σ = 674866368. Its totient is φ = 659975904.

The previous prime is 667402117. The next prime is 667402217. The reversal of 667402213 is 312204766.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667402213 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 (667402217) 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, 26770 + ... + 45292.

It is an arithmetic number, because the mean of its divisors is an integer number (84358296).

Almost surely, 2^667402213 is an apocalyptic number.

It is an amenable number.

667402213 is a deficient number, since it is larger than the sum of its proper divisors (7464155).

667402213 is a wasteful number, since it uses less digits than its factorization.

667402213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18923.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 667402213 is about 25834.1288415151. The cubic root of 667402213 is about 873.9016261046.

Adding to 667402213 its reverse (312204766), we get a palindrome (979606979).

The spelling of 667402213 in words is "six hundred sixty-seven million, four hundred two thousand, two hundred thirteen".