16866354620 has 12 divisors (see below), whose sum is σ = 35419344744. Its totient is φ = 6746541840.

The previous prime is 16866354613. The next prime is 16866354647. The reversal of 16866354620 is 2645366861.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421658846 + ... + 421658885.

It is an arithmetic number, because the mean of its divisors is an integer number (2951612062).

Almost surely, 2^16866354620 is an apocalyptic number.

16866354620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16866354620 is an abundant number, since it is smaller than the sum of its proper divisors (18552990124).

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

16866354620 is a wasteful number, since it uses less digits than its factorization.

16866354620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843317740 (or 843317738 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 47.

The spelling of 16866354620 in words is "sixteen billion, eight hundred sixty-six million, three hundred fifty-four thousand, six hundred twenty".