8868666820 has 24 divisors (see below), whose sum is σ = 20056831704. Its totient is φ = 3274584576.

The previous prime is 8868666817. The next prime is 8868666823. The reversal of 8868666820 is 286668688.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8868666817) and next prime (8868666823).

It can be written as a sum of positive squares in 4 ways, for example, as 837639364 + 8031027456 = 28942^2 + 89616^2 .

It is not an unprimeable number, because it can be changed into a prime (8868666823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17054869 + ... + 17055388.

It is an arithmetic number, because the mean of its divisors is an integer number (835701321).

Almost surely, 2^8868666820 is an apocalyptic number.

It is an amenable number.

8868666820 is an abundant number, since it is smaller than the sum of its proper divisors (11188164884).

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

8868666820 is a wasteful number, since it uses less digits than its factorization.

8868666820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34110279 (or 34110277 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 58.

The square root of 8868666820 is about 94173.5993790192. The cubic root of 8868666820 is about 2069.9162778184.

The spelling of 8868666820 in words is "eight billion, eight hundred sixty-eight million, six hundred sixty-six thousand, eight hundred twenty".