6668802667 has 4 divisors (see below), whose sum is σ = 6670436080. Its totient is φ = 6667169256.

The previous prime is 6668802659. The next prime is 6668802719. The reversal of 6668802667 is 7662088666.

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

It is a cyclic number.

It is not a de Polignac number, because 6668802667 - 2³ = 6668802659 is a prime.

It is a super-2 number, since 2×6668802667² = 88945858022772625778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6668802467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 810567 + ... + 818752.

It is an arithmetic number, because the mean of its divisors is an integer number (1667609020).

Almost surely, 2^6668802667 is an apocalyptic number.

6668802667 is a deficient number, since it is larger than the sum of its proper divisors (1633413).

6668802667 is a wasteful number, since it uses less digits than its factorization.

6668802667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633412.

The product of its (nonzero) digits is 6967296, while the sum is 55.

The square root of 6668802667 is about 81662.7373224777. The cubic root of 6668802667 is about 1882.2730416256.

The spelling of 6668802667 in words is "six billion, six hundred sixty-eight million, eight hundred two thousand, six hundred sixty-seven".