666046422020 has 48 divisors (see below), whose sum is σ = 1598731924608. Its totient is φ = 228327271680.

The previous prime is 666046421927. The next prime is 666046422031. The reversal of 666046422020 is 20224640666.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 701864 + ... + 1350816.

It is an arithmetic number, because the mean of its divisors is an integer number (33306915096).

Almost surely, 2^666046422020 is an apocalyptic number.

It is an amenable number.

666046422020 is an abundant number, since it is smaller than the sum of its proper divisors (932685502588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666046422020 is a wasteful number, since it uses less digits than its factorization.

666046422020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656300 (or 656298 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 666046422020 in words is "six hundred sixty-six billion, forty-six million, four hundred twenty-two thousand, twenty".