6667406771 has 4 divisors (see below), whose sum is σ = 6847606992. Its totient is φ = 6487206552.

The previous prime is 6667406761. The next prime is 6667406789. The reversal of 6667406771 is 1776047666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6667406771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6667406741) 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 in 3 ways as a sum of consecutive naturals, for example, 90100055 + ... + 90100128.

It is an arithmetic number, because the mean of its divisors is an integer number (1711901748).

Almost surely, 2^6667406771 is an apocalyptic number.

6667406771 is a deficient number, since it is larger than the sum of its proper divisors (180200221).

6667406771 is a wasteful number, since it uses less digits than its factorization.

6667406771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180200220.

The product of its (nonzero) digits is 1778112, while the sum is 50.

The square root of 6667406771 is about 81654.1901619262. The cubic root of 6667406771 is about 1882.1417016692.

The spelling of 6667406771 in words is "six billion, six hundred sixty-seven million, four hundred six thousand, seven hundred seventy-one".