16620166520 has 32 divisors (see below), whose sum is σ = 37758445920. Its totient is φ = 6583520640.

The previous prime is 16620166471. The next prime is 16620166523. The reversal of 16620166520 is 2566102661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16620166523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2012891 + ... + 2021130.

It is an arithmetic number, because the mean of its divisors is an integer number (1179951435).

Almost surely, 2^16620166520 is an apocalyptic number.

16620166520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16620166520 is an abundant number, since it is smaller than the sum of its proper divisors (21138279400).

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

16620166520 is a wasteful number, since it uses less digits than its factorization.

16620166520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4034135 (or 4034131 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 16620166520 in words is "sixteen billion, six hundred twenty million, one hundred sixty-six thousand, five hundred twenty".