6689270899 has 2 divisors, whose sum is σ = 6689270900. Its totient is φ = 6689270898.

The previous prime is 6689270879. The next prime is 6689270933. The reversal of 6689270899 is 9980729866.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6689270899 - 2⁵ = 6689270867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6689270899.

It is not a weakly prime, because it can be changed into another prime (6689270839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3344635449 + 3344635450.

It is an arithmetic number, because the mean of its divisors is an integer number (3344635450).

Almost surely, 2^6689270899 is an apocalyptic number.

6689270899 is a deficient number, since it is larger than the sum of its proper divisors (1).

6689270899 is an equidigital number, since it uses as much as digits as its factorization.

6689270899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23514624, while the sum is 64.

The square root of 6689270899 is about 81787.9630446926. The cubic root of 6689270899 is about 1884.1967978655.

The spelling of 6689270899 in words is "six billion, six hundred eighty-nine million, two hundred seventy thousand, eight hundred ninety-nine".