16665020 has 12 divisors (see below), whose sum is σ = 34996584. Its totient is φ = 6666000.

The previous prime is 16665001. The next prime is 16665023. The reversal of 16665020 is 2056661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16665023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416606 + ... + 416645.

It is an arithmetic number, because the mean of its divisors is an integer number (2916382).

Almost surely, 2^16665020 is an apocalyptic number.

16665020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16665020 is an abundant number, since it is smaller than the sum of its proper divisors (18331564).

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

16665020 is a wasteful number, since it uses less digits than its factorization.

16665020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833260 (or 833258 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 16665020 is about 4082.2812250015. The cubic root of 16665020 is about 255.4280648128.

The spelling of 16665020 in words is "sixteen million, six hundred sixty-five thousand, twenty".