866514132088540 has 48 divisors (see below), whose sum is σ = 2074928862912192. Its totient is φ = 301123463095296.

The previous prime is 866514132088529. The next prime is 866514132088639. The reversal of 866514132088540 is 45880231415668.

It is a super-2 number, since 2×866514132088540² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98021956224 + ... + 98021965063.

It is an arithmetic number, because the mean of its divisors is an integer number (43227684644004).

Almost surely, 2^{866514132088540} is an apocalyptic number.

It is an amenable number.

866514132088540 is an abundant number, since it is smaller than the sum of its proper divisors (1208414730823652).

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

866514132088540 is a wasteful number, since it uses less digits than its factorization.

866514132088540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196043921326 (or 196043921324 counting only the distinct ones).

The product of its (nonzero) digits is 44236800, while the sum is 61.

The spelling of 866514132088540 in words is "eight hundred sixty-six trillion, five hundred fourteen billion, one hundred thirty-two million, eighty-eight thousand, five hundred forty".