8664140421 has 12 divisors (see below), whose sum is σ = 12515680320. Its totient is φ = 5775719400.

The previous prime is 8664140351. The next prime is 8664140449. The reversal of 8664140421 is 1240414668.

It is a happy number.

8664140421 is a `hidden beast` number, since 8 + 6 + 641 + 4 + 0 + 4 + 2 + 1 = 666.

8664140421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8664140421 - 2⁹ = 8664139909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8664140461) 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, 235300 + ... + 269618.

It is an arithmetic number, because the mean of its divisors is an integer number (1042973360).

Almost surely, 2^8664140421 is an apocalyptic number.

It is an amenable number.

8664140421 is a deficient number, since it is larger than the sum of its proper divisors (3851539899).

8664140421 is a wasteful number, since it uses less digits than its factorization.

8664140421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62376 (or 62373 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 8664140421 is about 93081.3645205097. The cubic root of 8664140421 is about 2053.8804486691.

The spelling of 8664140421 in words is "eight billion, six hundred sixty-four million, one hundred forty thousand, four hundred twenty-one".