866112201 has 12 divisors (see below), whose sum is σ = 1251306420. Its totient is φ = 577290240.

The previous prime is 866112199. The next prime is 866112241. The reversal of 866112201 is 102211668.

It can be written as a sum of positive squares in 2 ways, for example, as 391090176 + 475022025 = 19776^2 + 21795^2 .

It is not a de Polignac number, because 866112201 - 2¹ = 866112199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (866112241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78345 + ... + 88713.

It is an arithmetic number, because the mean of its divisors is an integer number (104275535).

Almost surely, 2^866112201 is an apocalyptic number.

It is an amenable number.

866112201 is a deficient number, since it is larger than the sum of its proper divisors (385194219).

866112201 is a wasteful number, since it uses less digits than its factorization.

866112201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19656 (or 19653 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 866112201 is about 29429.7842499737. The cubic root of 866112201 is about 953.2161361655.

Adding to 866112201 its reverse (102211668), we get a palindrome (968323869).

The spelling of 866112201 in words is "eight hundred sixty-six million, one hundred twelve thousand, two hundred one".