985800000066 has 64 divisors (see below), whose sum is σ = 2392638393600. Its totient is φ = 264329441280.

The previous prime is 985800000047. The next prime is 985800000113. The reversal of 985800000066 is 660000008589.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 985799999973 and 985800000027.

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, 1728855 + ... + 2227226.

It is an arithmetic number, because the mean of its divisors is an integer number (37384974900).

Almost surely, 2^985800000066 is an apocalyptic number.

985800000066 is an abundant number, since it is smaller than the sum of its proper divisors (1406838393534).

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

985800000066 is a wasteful number, since it uses less digits than its factorization.

985800000066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3956459.

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 985800000066 in words is "nine hundred eighty-five billion, eight hundred million, sixty-six", and thus it is an aban number.