866845645 has 8 divisors (see below), whose sum is σ = 1094963040. Its totient is φ = 656977680.

The previous prime is 866845619. The next prime is 866845663. The reversal of 866845645 is 546548668.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 866845645 - 2⁷ = 866845517 is a prime.

It is a super-3 number, since 3×866845645³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 866845592 and 866845601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4562251 + ... + 4562440.

It is an arithmetic number, because the mean of its divisors is an integer number (136870380).

Almost surely, 2^866845645 is an apocalyptic number.

It is an amenable number.

866845645 is a deficient number, since it is larger than the sum of its proper divisors (228117395).

866845645 is a wasteful number, since it uses less digits than its factorization.

866845645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9124715.

The product of its digits is 5529600, while the sum is 52.

The square root of 866845645 is about 29442.2425266826. The cubic root of 866845645 is about 953.4851287976.

It can be divided in two parts, 86684 and 5645, that added together give a palindrome (92329).

The spelling of 866845645 in words is "eight hundred sixty-six million, eight hundred forty-five thousand, six hundred forty-five".