6667388945 has 16 divisors (see below), whose sum is σ = 9147377280. Its totient is φ = 4570159104.

The previous prime is 6667388941. The next prime is 6667388947. The reversal of 6667388945 is 5498837666.

It is not a de Polignac number, because 6667388945 - 2² = 6667388941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6667388941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58694 + ... + 129536.

It is an arithmetic number, because the mean of its divisors is an integer number (571711080).

Almost surely, 2^6667388945 is an apocalyptic number.

It is an amenable number.

6667388945 is a deficient number, since it is larger than the sum of its proper divisors (2479988335).

6667388945 is a wasteful number, since it uses less digits than its factorization.

6667388945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73544.

The product of its digits is 52254720, while the sum is 62.

The square root of 6667388945 is about 81654.0810064016. The cubic root of 6667388945 is about 1882.1400243010.

The spelling of 6667388945 in words is "six billion, six hundred sixty-seven million, three hundred eighty-eight thousand, nine hundred forty-five".