866225506145011 has 4 divisors (see below), whose sum is σ = 866229472179792. Its totient is φ = 866221540110232.

The previous prime is 866225506144937. The next prime is 866225506145023. The reversal of 866225506145011 is 110541605522668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 866225506145011 - 2¹¹ = 866225506142963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 866225506145011.

It is not an unprimeable number, because it can be changed into a prime (866225506149011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1982689756 + ... + 1983126601.

It is an arithmetic number, because the mean of its divisors is an integer number (216557368044948).

Almost surely, 2^{866225506145011} is an apocalyptic number.

866225506145011 is a deficient number, since it is larger than the sum of its proper divisors (3966034781).

866225506145011 is a wasteful number, since it uses less digits than its factorization.

866225506145011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3966034780.

The product of its (nonzero) digits is 3456000, while the sum is 52.

The spelling of 866225506145011 in words is "eight hundred sixty-six trillion, two hundred twenty-five billion, five hundred six million, one hundred forty-five thousand, eleven".