666662122 has 16 divisors (see below), whose sum is σ = 1162221120. Its totient is φ = 280869408.

The previous prime is 666662077. The next prime is 666662159. The reversal of 666662122 is 221266666.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402723 + ... + 404374.

It is an arithmetic number, because the mean of its divisors is an integer number (72638820).

Almost surely, 2^666662122 is an apocalyptic number.

666662122 is a deficient number, since it is larger than the sum of its proper divisors (495558998).

666662122 is a wasteful number, since it uses less digits than its factorization.

666662122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807165.

The product of its digits is 62208, while the sum is 37.

The square root of 666662122 is about 25819.8009674746. The cubic root of 666662122 is about 873.5784796658.

The spelling of 666662122 in words is "six hundred sixty-six million, six hundred sixty-two thousand, one hundred twenty-two".