866532235668 has 96 divisors (see below), whose sum is σ = 2327198791680. Its totient is φ = 248187744000.

The previous prime is 866532235643. The next prime is 866532235669.

866532235668 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866532235669) 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 31 ways as a sum of consecutive naturals, for example, 680128 + ... + 1481768.

It is an arithmetic number, because the mean of its divisors is an integer number (24241654080).

Almost surely, 2^866532235668 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 866532235668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1163599395840).

866532235668 is an abundant number, since it is smaller than the sum of its proper divisors (1460666556012).

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

866532235668 is a wasteful number, since it uses less digits than its factorization.

866532235668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802109 (or 802107 counting only the distinct ones).

The product of its digits is 74649600, while the sum is 60.

The spelling of 866532235668 in words is "eight hundred sixty-six billion, five hundred thirty-two million, two hundred thirty-five thousand, six hundred sixty-eight".