16662361699020 has 96 divisors (see below), whose sum is σ = 47195117544960. Its totient is φ = 4391854297600.

The previous prime is 16662361698991. The next prime is 16662361699021. The reversal of 16662361699020 is 2099616326661.

It is a super-2 number, since 2×16662361699020² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16662361699021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14964595 + ... + 16039445.

It is an arithmetic number, because the mean of its divisors is an integer number (491615807760).

Almost surely, 2^{16662361699020} is an apocalyptic number.

16662361699020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16662361699020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23597558772480).

16662361699020 is an abundant number, since it is smaller than the sum of its proper divisors (30532755845940).

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

16662361699020 is a wasteful number, since it uses less digits than its factorization.

16662361699020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077855 (or 1077853 counting only the distinct ones).

The product of its (nonzero) digits is 7558272, while the sum is 57.

The spelling of 16662361699020 in words is "sixteen trillion, six hundred sixty-two billion, three hundred sixty-one million, six hundred ninety-nine thousand, twenty".