866149088 has 192 divisors, whose sum is σ = 2148249600. Its totient is φ = 342752256.

The previous prime is 866149013. The next prime is 866149117. The reversal of 866149088 is 880941668.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11865020 + ... + 11865092.

It is an arithmetic number, because the mean of its divisors is an integer number (11188800).

Almost surely, 2^866149088 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 866149088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1074124800).

866149088 is an abundant number, since it is smaller than the sum of its proper divisors (1282100512).

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

866149088 is a wasteful number, since it uses less digits than its factorization.

866149088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 50.

The square root of 866149088 is about 29430.4109383474. The cubic root of 866149088 is about 953.2296682015.

The spelling of 866149088 in words is "eight hundred sixty-six million, one hundred forty-nine thousand, eighty-eight".