6667788899 has 2 divisors, whose sum is σ = 6667788900. Its totient is φ = 6667788898.

The previous prime is 6667788859. The next prime is 6667788913. The reversal of 6667788899 is 9988877666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6667788899 is a prime.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is not a weakly prime, because it can be changed into another prime (6667788839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333894449 + 3333894450.

It is an arithmetic number, because the mean of its divisors is an integer number (3333894450).

Almost surely, 2^6667788899 is an apocalyptic number.

6667788899 is a deficient number, since it is larger than the sum of its proper divisors (1).

6667788899 is an equidigital number, since it uses as much as digits as its factorization.

6667788899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 438939648, while the sum is 74.

The square root of 6667788899 is about 81656.5300450613. The cubic root of 6667788899 is about 1882.1776579427.

The spelling of 6667788899 in words is "six billion, six hundred sixty-seven million, seven hundred eighty-eight thousand, eight hundred ninety-nine".