1800900066 has 64 divisors (see below), whose sum is σ = 4587909120. Its totient is φ = 458784000.

The previous prime is 1800900041. The next prime is 1800900077. The reversal of 1800900066 is 6600090081.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52810 + ... + 79941.

It is an arithmetic number, because the mean of its divisors is an integer number (71686080).

Almost surely, 2^1800900066 is an apocalyptic number.

1800900066 is an abundant number, since it is smaller than the sum of its proper divisors (2787009054).

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

1800900066 is a wasteful number, since it uses less digits than its factorization.

1800900066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132799.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 1800900066 is about 42437.0129250399. The cubic root of 1800900066 is about 1216.6431202632.

The spelling of 1800900066 in words is "one billion, eight hundred million, nine hundred thousand, sixty-six".