866181750325540 has 48 divisors (see below), whose sum is σ = 1988592776299584. Its totient is φ = 314300716841600.

The previous prime is 866181750325531. The next prime is 866181750325547. The reversal of 866181750325540 is 45523057181668.

It is a super-2 number, since 2×866181750325540² (a number of 31 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (866181750325547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4215303871 + ... + 4215509350.

It is an arithmetic number, because the mean of its divisors is an integer number (41429016172908).

Almost surely, 2^{866181750325540} is an apocalyptic number.

It is an amenable number.

866181750325540 is an abundant number, since it is smaller than the sum of its proper divisors (1122411025974044).

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

866181750325540 is a wasteful number, since it uses less digits than its factorization.

866181750325540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8430813708 (or 8430813706 counting only the distinct ones).

The product of its (nonzero) digits is 48384000, while the sum is 61.

The spelling of 866181750325540 in words is "eight hundred sixty-six trillion, one hundred eighty-one billion, seven hundred fifty million, three hundred twenty-five thousand, five hundred forty".