8668021340 has 36 divisors (see below), whose sum is σ = 20008091208. Its totient is φ = 3152006880.

The previous prime is 8668021337. The next prime is 8668021361. The reversal of 8668021340 is 431208668.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 8668021294 and 8668021303.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1788494 + ... + 1793333.

Almost surely, 2^8668021340 is an apocalyptic number.

It is an amenable number.

8668021340 is an abundant number, since it is smaller than the sum of its proper divisors (11340069868).

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

8668021340 is a wasteful number, since it uses less digits than its factorization.

8668021340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581858 (or 3581845 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 8668021340 is about 93102.2091037586. The cubic root of 8668021340 is about 2054.1870670381.

The spelling of 8668021340 in words is "eight billion, six hundred sixty-eight million, twenty-one thousand, three hundred forty".