8664664387 has 2 divisors, whose sum is σ = 8664664388. Its totient is φ = 8664664386.

The previous prime is 8664664369. The next prime is 8664664391. The reversal of 8664664387 is 7834664668.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8664664387 - 2¹¹ = 8664662339 is a prime.

It is not a weakly prime, because it can be changed into another prime (8664664787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4332332193 + 4332332194.

It is an arithmetic number, because the mean of its divisors is an integer number (4332332194).

Almost surely, 2^8664664387 is an apocalyptic number.

8664664387 is a deficient number, since it is larger than the sum of its proper divisors (1).

8664664387 is an equidigital number, since it uses as much as digits as its factorization.

8664664387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27869184, while the sum is 58.

The square root of 8664664387 is about 93084.1790370415. The cubic root of 8664664387 is about 2053.9218508078.

The spelling of 8664664387 in words is "eight billion, six hundred sixty-four million, six hundred sixty-four thousand, three hundred eighty-seven".