868665051 has 12 divisors (see below), whose sum is σ = 1255463040. Its totient is φ = 578775600.

The previous prime is 868665041. The next prime is 868665079. The reversal of 868665051 is 150566868.

868665051 is a `hidden beast` number, since 86 + 8 + 66 + 505 + 1 = 666.

It is not a de Polignac number, because 868665051 - 2⁶ = 868664987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 868664988 and 868665006.

It is not an unprimeable number, because it can be changed into a prime (868665041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10875 + ... + 43076.

It is an arithmetic number, because the mean of its divisors is an integer number (104621920).

Almost surely, 2^868665051 is an apocalyptic number.

868665051 is a deficient number, since it is larger than the sum of its proper divisors (386797989).

868665051 is a wasteful number, since it uses less digits than its factorization.

868665051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55746 (or 55743 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 868665051 is about 29473.1242151218. The cubic root of 868665051 is about 954.1517466247.

It can be divided in two parts, 8686 and 65051, that added together give a palindrome (73737).

The spelling of 868665051 in words is "eight hundred sixty-eight million, six hundred sixty-five thousand, fifty-one".