866268220 has 12 divisors (see below), whose sum is σ = 1819163304. Its totient is φ = 346507280.

The previous prime is 866268217. The next prime is 866268229. The reversal of 866268220 is 22862668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866268229) 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, 21656686 + ... + 21656725.

It is an arithmetic number, because the mean of its divisors is an integer number (151596942).

Almost surely, 2^866268220 is an apocalyptic number.

It is an amenable number.

866268220 is an abundant number, since it is smaller than the sum of its proper divisors (952895084).

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

866268220 is a wasteful number, since it uses less digits than its factorization.

866268220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43313420 (or 43313418 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 866268220 is about 29432.4348296229. The cubic root of 866268220 is about 953.2733692811.

The spelling of 866268220 in words is "eight hundred sixty-six million, two hundred sixty-eight thousand, two hundred twenty".