866378688 has 112 divisors (see below), whose sum is σ = 2649565440. Its totient is φ = 244721664.

The previous prime is 866378687. The next prime is 866378693. The reversal of 866378688 is 886873668.

866378688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×866378688² = 1501224062041202688, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866378687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115995 + ... + 123237.

Almost surely, 2^866378688 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 866378688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1324782720).

866378688 is an abundant number, since it is smaller than the sum of its proper divisors (1783186752).

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

866378688 is a wasteful number, since it uses less digits than its factorization.

866378688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7354 (or 7344 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 60.

The square root of 866378688 is about 29434.3114069278. The cubic root of 866378688 is about 953.3138885738.

The spelling of 866378688 in words is "eight hundred sixty-six million, three hundred seventy-eight thousand, six hundred eighty-eight".