16666980 has 48 divisors (see below), whose sum is σ = 50912064. Its totient is φ = 4040320.

The previous prime is 16666961. The next prime is 16666997. The reversal of 16666980 is 8966661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11967 + ... + 13286.

It is an arithmetic number, because the mean of its divisors is an integer number (1060668).

Almost surely, 2^16666980 is an apocalyptic number.

16666980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16666980 is an abundant number, since it is smaller than the sum of its proper divisors (34245084).

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

16666980 is a wasteful number, since it uses less digits than its factorization.

16666980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25276 (or 25274 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 16666980 is about 4082.5212797976. The cubic root of 16666980 is about 255.4380781897.

It can be divided in two parts, 1666 and 6980, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 16666980 in words is "sixteen million, six hundred sixty-six thousand, nine hundred eighty".