6420422668 has 24 divisors (see below), whose sum is σ = 12440119104. Its totient is φ = 2874814800.

The previous prime is 6420422647. The next prime is 6420422681. The reversal of 6420422668 is 8662240246.

It is a self number, because there is not a number n which added to its sum of digits gives 6420422668.

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, 1085998 + ... + 1091893.

It is an arithmetic number, because the mean of its divisors is an integer number (518338296).

Almost surely, 2^6420422668 is an apocalyptic number.

It is an amenable number.

6420422668 is a deficient number, since it is larger than the sum of its proper divisors (6019696436).

6420422668 is a wasteful number, since it uses less digits than its factorization.

6420422668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2177973 (or 2177971 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 40.

The square root of 6420422668 is about 80127.5400096621. The cubic root of 6420422668 is about 1858.6083037778.

The spelling of 6420422668 in words is "six billion, four hundred twenty million, four hundred twenty-two thousand, six hundred sixty-eight".