866545511316475 has 24 divisors (see below), whose sum is σ = 1075605002342640. Its totient is φ = 692534246064000.

The previous prime is 866545511316379. The next prime is 866545511316521. The reversal of 866545511316475 is 574613115545668.

It is a happy number.

It is not a de Polignac number, because 866545511316475 - 2¹⁹ = 866545510792187 is a prime.

It is a super-2 number, since 2×866545511316475² (a number of 31 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 866545511316475.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 248095705 + ... + 251564245.

It is an arithmetic number, because the mean of its divisors is an integer number (44816875097610).

Almost surely, 2^{866545511316475} is an apocalyptic number.

866545511316475 is a deficient number, since it is larger than the sum of its proper divisors (209059491026165).

866545511316475 is a wasteful number, since it uses less digits than its factorization.

866545511316475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3478671 (or 3478666 counting only the distinct ones).

The product of its digits is 362880000, while the sum is 67.

The spelling of 866545511316475 in words is "eight hundred sixty-six trillion, five hundred forty-five billion, five hundred eleven million, three hundred sixteen thousand, four hundred seventy-five".