16667016820 has 12 divisors (see below), whose sum is σ = 35000735364. Its totient is φ = 6666806720.

The previous prime is 16667016803. The next prime is 16667016829. The reversal of 16667016820 is 2861076661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12346320996 + 4320695824 = 111114^2 + 65732^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16667016829) 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, 416675401 + ... + 416675440.

It is an arithmetic number, because the mean of its divisors is an integer number (2916727947).

Almost surely, 2^16667016820 is an apocalyptic number.

16667016820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16667016820 is an abundant number, since it is smaller than the sum of its proper divisors (18333718544).

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

16667016820 is a wasteful number, since it uses less digits than its factorization.

16667016820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833350850 (or 833350848 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 16667016820 in words is "sixteen billion, six hundred sixty-seven million, sixteen thousand, eight hundred twenty".