8666659380 has 48 divisors (see below), whose sum is σ = 24393729024. Its totient is φ = 2299006080.

The previous prime is 8666659361. The next prime is 8666659387. The reversal of 8666659380 is 839566668.

It is a super-2 number, since 2×8666659380² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8666659380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8666659387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 366667 + ... + 389586.

It is an arithmetic number, because the mean of its divisors is an integer number (508202688).

Almost surely, 2^8666659380 is an apocalyptic number.

It is an amenable number.

8666659380 is an abundant number, since it is smaller than the sum of its proper divisors (15727069644).

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

8666659380 is a wasteful number, since it uses less digits than its factorization.

8666659380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756456 (or 756454 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 57.

The square root of 8666659380 is about 93094.8944894402. The cubic root of 8666659380 is about 2054.0794735804.

The spelling of 8666659380 in words is "eight billion, six hundred sixty-six million, six hundred fifty-nine thousand, three hundred eighty".