16666480 has 40 divisors (see below), whose sum is σ = 38997504. Its totient is φ = 6624000.

The previous prime is 16666453. The next prime is 16666487. The reversal of 16666480 is 8466661.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16666487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13905 + ... + 15055.

Almost surely, 2^16666480 is an apocalyptic number.

16666480 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 16666480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19498752).

16666480 is an abundant number, since it is smaller than the sum of its proper divisors (22331024).

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

16666480 is a wasteful number, since it uses less digits than its factorization.

16666480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345 (or 1339 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 16666480 is about 4082.4600426704. The cubic root of 16666480 is about 255.4355238314.

The spelling of 16666480 in words is "sixteen million, six hundred sixty-six thousand, four hundred eighty".