16666806000 has 320 divisors, whose sum is σ = 58278519936. Its totient is φ = 4073472000.

The previous prime is 16666805999. The next prime is 16666806007. The reversal of 16666806000 is 60866661.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 16666806000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16666806007) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12245320 + ... + 12246680.

Almost surely, 2^16666806000 is an apocalyptic number.

16666806000 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 16666806000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29139259968).

16666806000 is an abundant number, since it is smaller than the sum of its proper divisors (41611713936).

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

16666806000 is a wasteful number, since it uses less digits than its factorization.

16666806000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557 (or 1541 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 16666806000 in words is "sixteen billion, six hundred sixty-six million, eight hundred six thousand".