866118741072 has 320 divisors, whose sum is σ = 2525438361600. Its totient is φ = 254062448640.

The previous prime is 866118741053. The next prime is 866118741077. The reversal of 866118741072 is 270147811668.

It is a super-2 number, since 2×866118741072² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866118741077) 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 63 ways as a sum of consecutive naturals, for example, 188653497 + ... + 188658087.

It is an arithmetic number, because the mean of its divisors is an integer number (7891994880).

Almost surely, 2^866118741072 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 866118741072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1262719180800).

866118741072 is an abundant number, since it is smaller than the sum of its proper divisors (1659319620528).

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

866118741072 is a wasteful number, since it uses less digits than its factorization.

866118741072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4826 (or 4820 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 51.

The spelling of 866118741072 in words is "eight hundred sixty-six billion, one hundred eighteen million, seven hundred forty-one thousand, seventy-two".