866140000 has 240 divisors, whose sum is σ = 2418425856. Its totient is φ = 302400000.

The previous prime is 866139991. The next prime is 866140027. The reversal of 866140000 is 41668.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6819937 + ... + 6820063.

Almost surely, 2^866140000 is an apocalyptic number.

866140000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866140000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1209212928).

866140000 is an abundant number, since it is smaller than the sum of its proper divisors (1552285856).

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

866140000 is a wasteful number, since it uses less digits than its factorization.

866140000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 866140000 is about 29430.2565398265. The cubic root of 866140000 is about 953.2263342945.

Adding to 866140000 its reverse (41668), we get a palindrome (866181668).

The spelling of 866140000 in words is "eight hundred sixty-six million, one hundred forty thousand".