666422640622 has 8 divisors (see below), whose sum is σ = 1000553590656. Its totient is φ = 332904777072.

The previous prime is 666422640619. The next prime is 666422640623. The reversal of 666422640622 is 226046224666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666422640623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153268903 + ... + 153273250.

It is an arithmetic number, because the mean of its divisors is an integer number (125069198832).

Almost surely, 2^666422640622 is an apocalyptic number.

666422640622 is a deficient number, since it is larger than the sum of its proper divisors (334130950034).

666422640622 is a wasteful number, since it uses less digits than its factorization.

666422640622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306543242.

The product of its (nonzero) digits is 1990656, while the sum is 46.

The spelling of 666422640622 in words is "six hundred sixty-six billion, four hundred twenty-two million, six hundred forty thousand, six hundred twenty-two".