866550006 has 144 divisors (see below), whose sum is σ = 2312489088. Its totient is φ = 233452800.

The previous prime is 866549977. The next prime is 866550011. The reversal of 866550006 is 600055668.

866550006 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1120636 + ... + 1121408.

It is an arithmetic number, because the mean of its divisors is an integer number (16058952).

Almost surely, 2^866550006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866550006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1156244544).

866550006 is an abundant number, since it is smaller than the sum of its proper divisors (1445939082).

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

866550006 is a wasteful number, since it uses less digits than its factorization.

866550006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867 (or 857 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 866550006 is about 29437.2214381725. The cubic root of 866550006 is about 953.3767206307.

The spelling of 866550006 in words is "eight hundred sixty-six million, five hundred fifty thousand, six".