6667777799 has 2 divisors, whose sum is σ = 6667777800. Its totient is φ = 6667777798.

The previous prime is 6667777789. The next prime is 6667777801. The reversal of 6667777799 is 9977777666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6667777799 - 2²⁴ = 6651000583 is a prime.

It is a super-3 number, since 3×6667777799³ (a number of 30 digits) contains 333 as substring.

Together with 6667777801, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6667777789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333888899 + 3333888900.

It is an arithmetic number, because the mean of its divisors is an integer number (3333888900).

Almost surely, 2^6667777799 is an apocalyptic number.

6667777799 is a deficient number, since it is larger than the sum of its proper divisors (1).

6667777799 is an equidigital number, since it uses as much as digits as its factorization.

6667777799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 294055272, while the sum is 71.

The square root of 6667777799 is about 81656.4620774131. The cubic root of 6667777799 is about 1882.1766135094.

The spelling of 6667777799 in words is "six billion, six hundred sixty-seven million, seven hundred seventy-seven thousand, seven hundred ninety-nine".