866727960 has 256 divisors, whose sum is σ = 3099340800. Its totient is φ = 189775872.

The previous prime is 866727931. The next prime is 866727971. The reversal of 866727960 is 69727668.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2455144 + ... + 2455496.

It is an arithmetic number, because the mean of its divisors is an integer number (12106800).

Almost surely, 2^866727960 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 866727960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1549670400).

866727960 is an abundant number, since it is smaller than the sum of its proper divisors (2232612840).

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

866727960 is a wasteful number, since it uses less digits than its factorization.

866727960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 51.

The square root of 866727960 is about 29440.2438848594. The cubic root of 866727960 is about 953.4419777182.

The spelling of 866727960 in words is "eight hundred sixty-six million, seven hundred twenty-seven thousand, nine hundred sixty".