2066681600 has 54 divisors (see below), whose sum is σ = 5115375720. Its totient is φ = 826670080.

The previous prime is 2066681599. The next prime is 2066681627. The reversal of 2066681600 is 61866602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 155060 + ... + 167859.

It is an arithmetic number, because the mean of its divisors is an integer number (94729180).

Almost surely, 2^2066681600 is an apocalyptic number.

2066681600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2066681600 is an abundant number, since it is smaller than the sum of its proper divisors (3048694120).

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

2066681600 is an equidigital number, since it uses as much as digits as its factorization.

2066681600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322945 (or 322926 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 2066681600 is about 45460.7699010916. The cubic root of 2066681600 is about 1273.7705128470.

The spelling of 2066681600 in words is "two billion, sixty-six million, six hundred eighty-one thousand, six hundred".