666702238 has 8 divisors (see below), whose sum is σ = 1021331232. Its totient is φ = 326258496.

The previous prime is 666702233. The next prime is 666702247. The reversal of 666702238 is 832207666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 666702238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666702233) 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 3 ways as a sum of consecutive naturals, for example, 3546195 + ... + 3546382.

It is an arithmetic number, because the mean of its divisors is an integer number (127666404).

Almost surely, 2^666702238 is an apocalyptic number.

666702238 is a deficient number, since it is larger than the sum of its proper divisors (354628994).

666702238 is a wasteful number, since it uses less digits than its factorization.

666702238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7092626.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 666702238 is about 25820.5778014358. The cubic root of 666702238 is about 873.5960016709.

The spelling of 666702238 in words is "six hundred sixty-six million, seven hundred two thousand, two hundred thirty-eight".