16680780 has 36 divisors (see below), whose sum is σ = 50598912. Its totient is φ = 4448160.

The previous prime is 16680767. The next prime is 16680787. The reversal of 16680780 is 8708661.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (16680787) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46156 + ... + 46515.

Almost surely, 2^16680780 is an apocalyptic number.

16680780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16680780 is an abundant number, since it is smaller than the sum of its proper divisors (33918132).

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

16680780 is a wasteful number, since it uses less digits than its factorization.

16680780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92686 (or 92681 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 16680780 is about 4084.2110621269. The cubic root of 16680780 is about 255.5085583254.

The spelling of 16680780 in words is "sixteen million, six hundred eighty thousand, seven hundred eighty".