16662984780 has 192 divisors, whose sum is σ = 52086545280. Its totient is φ = 3953442816.

The previous prime is 16662984773. The next prime is 16662984791. The reversal of 16662984780 is 8748926661.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 16662984780.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3143092 + ... + 3148388.

It is an arithmetic number, because the mean of its divisors is an integer number (271284090).

Almost surely, 2^16662984780 is an apocalyptic number.

16662984780 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 16662984780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26043272640).

16662984780 is an abundant number, since it is smaller than the sum of its proper divisors (35423560500).

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

16662984780 is a wasteful number, since it uses less digits than its factorization.

16662984780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5468 (or 5466 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 57.

The spelling of 16662984780 in words is "sixteen billion, six hundred sixty-two million, nine hundred eighty-four thousand, seven hundred eighty".