866195107 has 4 divisors (see below), whose sum is σ = 880876440. Its totient is φ = 851513776.

The previous prime is 866195051. The next prime is 866195119. The reversal of 866195107 is 701591668.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866195107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866195137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7340578 + ... + 7340695.

It is an arithmetic number, because the mean of its divisors is an integer number (220219110).

Almost surely, 2^866195107 is an apocalyptic number.

866195107 is a deficient number, since it is larger than the sum of its proper divisors (14681333).

866195107 is a wasteful number, since it uses less digits than its factorization.

866195107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14681332.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 866195107 is about 29431.1927553064. The cubic root of 866195107 is about 953.2465497830.

The spelling of 866195107 in words is "eight hundred sixty-six million, one hundred ninety-five thousand, one hundred seven".