666022642 has 16 divisors (see below), whose sum is σ = 1034985600. Its totient is φ = 321060880.

The previous prime is 666022639. The next prime is 666022649. The reversal of 666022642 is 246220666.

It is a junction number, because it is equal to n+sod(n) for n = 666022598 and 666022607.

It is not an unprimeable number, because it can be changed into a prime (666022649) 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 7 ways as a sum of consecutive naturals, for example, 33717 + ... + 49687.

It is an arithmetic number, because the mean of its divisors is an integer number (64686600).

Almost surely, 2^666022642 is an apocalyptic number.

666022642 is a deficient number, since it is larger than the sum of its proper divisors (368962958).

666022642 is a wasteful number, since it uses less digits than its factorization.

666022642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16721.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 666022642 is about 25807.4144772389. The cubic root of 666022642 is about 873.2990704206.

The spelling of 666022642 in words is "six hundred sixty-six million, twenty-two thousand, six hundred forty-two".