16866528087 has 16 divisors (see below), whose sum is σ = 24260847840. Its totient is φ = 10383240192.

The previous prime is 16866528083. The next prime is 16866528097. The reversal of 16866528087 is 78082566861.

It is a happy number.

It is not a de Polignac number, because 16866528087 - 2² = 16866528083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16866528083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3117262 + ... + 3122667.

It is an arithmetic number, because the mean of its divisors is an integer number (1516302990).

Almost surely, 2^16866528087 is an apocalyptic number.

16866528087 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

16866528087 is a deficient number, since it is larger than the sum of its proper divisors (7394319753).

16866528087 is a wasteful number, since it uses less digits than its factorization.

16866528087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6240002.

The product of its (nonzero) digits is 7741440, while the sum is 57.

The spelling of 16866528087 in words is "sixteen billion, eight hundred sixty-six million, five hundred twenty-eight thousand, eighty-seven".