16666533276 has 96 divisors (see below), whose sum is σ = 41603466240. Its totient is φ = 5183802624.

The previous prime is 16666533269. The next prime is 16666533293. The reversal of 16666533276 is 67233566661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1229005 + ... + 1242491.

It is an arithmetic number, because the mean of its divisors is an integer number (433369440).

Almost surely, 2^16666533276 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16666533276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20801733120).

16666533276 is an abundant number, since it is smaller than the sum of its proper divisors (24936932964).

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

16666533276 is a wasteful number, since it uses less digits than its factorization.

16666533276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13643 (or 13641 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 51.

The spelling of 16666533276 in words is "sixteen billion, six hundred sixty-six million, five hundred thirty-three thousand, two hundred seventy-six".