866777700 has 72 divisors (see below), whose sum is σ = 2524838400. Its totient is φ = 229577600.

The previous prime is 866777699. The next prime is 866777707. The reversal of 866777700 is 7777668.

It is a self number, because there is not a number n which added to its sum of digits gives 866777700.

It is not an unprimeable number, because it can be changed into a prime (866777707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35005 + ... + 54395.

It is an arithmetic number, because the mean of its divisors is an integer number (35067200).

Almost surely, 2^866777700 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 866777700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1262419200).

866777700 is an abundant number, since it is smaller than the sum of its proper divisors (1658060700).

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

866777700 is a wasteful number, since it uses less digits than its factorization.

866777700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19557 (or 19550 counting only the distinct ones).

The product of its (nonzero) digits is 691488, while the sum is 48.

The square root of 866777700 is about 29441.0886347635. The cubic root of 866777700 is about 953.4602161578.

The spelling of 866777700 in words is "eight hundred sixty-six million, seven hundred seventy-seven thousand, seven hundred".