6667776247 has 16 divisors (see below), whose sum is σ = 7417124640. Its totient is φ = 5942476800.

The previous prime is 6667776239. The next prime is 6667776277. The reversal of 6667776247 is 7426777666.

It is a cyclic number.

It is not a de Polignac number, because 6667776247 - 2³ = 6667776239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6667776191 and 6667776200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6667776277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 864247 + ... + 871927.

It is an arithmetic number, because the mean of its divisors is an integer number (463570290).

Almost surely, 2^6667776247 is an apocalyptic number.

6667776247 is a deficient number, since it is larger than the sum of its proper divisors (749348393).

6667776247 is a wasteful number, since it uses less digits than its factorization.

6667776247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9234.

The product of its digits is 24893568, while the sum is 58.

The square root of 6667776247 is about 81656.4525741842. The cubic root of 6667776247 is about 1882.1764674768.

The spelling of 6667776247 in words is "six billion, six hundred sixty-seven million, seven hundred seventy-six thousand, two hundred forty-seven".