666022439 has 8 divisors (see below), whose sum is σ = 691677360. Its totient is φ = 640546816.

The previous prime is 666022429. The next prime is 666022451. The reversal of 666022439 is 934220666.

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-666022439 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 (666022429) 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, 37229 + ... + 52134.

It is an arithmetic number, because the mean of its divisors is an integer number (86459670).

Almost surely, 2^666022439 is an apocalyptic number.

666022439 is a deficient number, since it is larger than the sum of its proper divisors (25654921).

666022439 is a wasteful number, since it uses less digits than its factorization.

666022439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89649.

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 666022439 is about 25807.4105442603. The cubic root of 666022439 is about 873.2989816950.

The spelling of 666022439 in words is "six hundred sixty-six million, twenty-two thousand, four hundred thirty-nine".