866625526668 has 48 divisors (see below), whose sum is σ = 2206031466240. Its totient is φ = 262604798400.

The previous prime is 866625526639. The next prime is 866625526693.

866625526668 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a junction number, because it is equal to n+sod(n) for n = 866625526599 and 866625526608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4454673 + ... + 4645143.

It is an arithmetic number, because the mean of its divisors is an integer number (45958988880).

Almost surely, 2^866625526668 is an apocalyptic number.

It is an amenable number.

866625526668 is an abundant number, since it is smaller than the sum of its proper divisors (1339405939572).

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

866625526668 is a wasteful number, since it uses less digits than its factorization.

866625526668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224958 (or 224956 counting only the distinct ones).

The product of its digits is 298598400, while the sum is 66.

The spelling of 866625526668 in words is "eight hundred sixty-six billion, six hundred twenty-five million, five hundred twenty-six thousand, six hundred sixty-eight".