99866112257 has 8 divisors (see below), whose sum is σ = 101895566760. Its totient is φ = 97842035200.

The previous prime is 99866112251. The next prime is 99866112323. The reversal of 99866112257 is 75221166899.

It is a Cunningham number, because it is equal to 316016²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 35064809536 + 64801302721 = 187256^2 + 254561^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99866112257 - 2²⁰ = 99865063681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99866112251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1306832 + ... + 1381137.

It is an arithmetic number, because the mean of its divisors is an integer number (12736945845).

Almost surely, 2^99866112257 is an apocalyptic number.

It is an amenable number.

99866112257 is a deficient number, since it is larger than the sum of its proper divisors (2029454503).

99866112257 is a wasteful number, since it uses less digits than its factorization.

99866112257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2688723.

The product of its digits is 3265920, while the sum is 56.

The spelling of 99866112257 in words is "ninety-nine billion, eight hundred sixty-six million, one hundred twelve thousand, two hundred fifty-seven".