16660777280 has 112 divisors (see below), whose sum is σ = 45382622976. Its totient is φ = 5707038720.

The previous prime is 16660777279. The next prime is 16660777313. The reversal of 16660777280 is 8277706661.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3059360 + ... + 3064800.

Almost surely, 2^16660777280 is an apocalyptic number.

16660777280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16660777280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22691311488).

16660777280 is an abundant number, since it is smaller than the sum of its proper divisors (28721845696).

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

16660777280 is a wasteful number, since it uses less digits than its factorization.

16660777280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6832 (or 6822 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 50.

The spelling of 16660777280 in words is "sixteen billion, six hundred sixty million, seven hundred seventy-seven thousand, two hundred eighty".