866948166 has 24 divisors (see below), whose sum is σ = 2146729104. Its totient is φ = 247699440.

The previous prime is 866948161. The next prime is 866948171. The reversal of 866948166 is 661849668.

It is an interprime number because it is at equal distance from previous prime (866948161) and next prime (866948171).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866948161) 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, 3440145 + ... + 3440396.

It is an arithmetic number, because the mean of its divisors is an integer number (89447046).

Almost surely, 2^866948166 is an apocalyptic number.

866948166 is an abundant number, since it is smaller than the sum of its proper divisors (1279780938).

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

866948166 is a wasteful number, since it uses less digits than its factorization.

866948166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6880556 (or 6880553 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The square root of 866948166 is about 29443.9835280486. The cubic root of 866948166 is about 953.5227165719.

The spelling of 866948166 in words is "eight hundred sixty-six million, nine hundred forty-eight thousand, one hundred sixty-six".