866276208 has 400 divisors, whose sum is σ = 3130674624. Its totient is φ = 225607680.

The previous prime is 866276207. The next prime is 866276219. The reversal of 866276208 is 802672668.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866276207) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 6323116 + ... + 6323252.

Almost surely, 2^866276208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866276208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1565337312).

866276208 is an abundant number, since it is smaller than the sum of its proper divisors (2264398416).

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

866276208 is a wasteful number, since it uses less digits than its factorization.

866276208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 866276208 is about 29432.5705299418. The cubic root of 866276208 is about 953.2762993683.

The spelling of 866276208 in words is "eight hundred sixty-six million, two hundred seventy-six thousand, two hundred eight".