16666568020 has 48 divisors (see below), whose sum is σ = 35369792640. Its totient is φ = 6596263296.

The previous prime is 16666567999. The next prime is 16666568041. The reversal of 16666568020 is 2086566661.

It is an interprime number because it is at equal distance from previous prime (16666567999) and next prime (16666568041).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3072871 + ... + 3078289.

It is an arithmetic number, because the mean of its divisors is an integer number (736870680).

Almost surely, 2^16666568020 is an apocalyptic number.

16666568020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16666568020 is an abundant number, since it is smaller than the sum of its proper divisors (18703224620).

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

16666568020 is a wasteful number, since it uses less digits than its factorization.

16666568020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7024 (or 7022 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 16666568020 in words is "sixteen billion, six hundred sixty-six million, five hundred sixty-eight thousand, twenty".