16666020 has 96 divisors (see below), whose sum is σ = 59270400. Its totient is φ = 3808512.

The previous prime is 16666019. The next prime is 16666033. The reversal of 16666020 is 2066661.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 8.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1576 + ... + 5984.

It is an arithmetic number, because the mean of its divisors is an integer number (617400).

Almost surely, 2^16666020 is an apocalyptic number.

16666020 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 16666020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29635200).

16666020 is an abundant number, since it is smaller than the sum of its proper divisors (42604380).

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

16666020 is a wasteful number, since it uses less digits than its factorization.

16666020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4434 (or 4426 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 16666020 is about 4082.4037037020. The cubic root of 16666020 is about 255.4331737767.

The spelling of 16666020 in words is "sixteen million, six hundred sixty-six thousand, twenty".