7666666667 has 4 divisors (see below), whose sum is σ = 8363636376. Its totient is φ = 6969696960.

The previous prime is 7666666607. The next prime is 7666666673.

It is a happy number.

7666666667 is nontrivially palindromic in base 10.

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 7666666667 - 2²⁶ = 7599557803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7666666607) 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, 348484838 + ... + 348484859.

It is an arithmetic number, because the mean of its divisors is an integer number (2090909094).

Almost surely, 2^7666666667 is an apocalyptic number.

7666666667 is a deficient number, since it is larger than the sum of its proper divisors (696969709).

7666666667 is a wasteful number, since it uses less digits than its factorization.

7666666667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696969708.

The product of its digits is 82301184, while the sum is 62.

The square root of 7666666667 is about 87559.5035789948. The cubic root of 7666666667 is about 1971.8272332621.

The spelling of 7666666667 in words is "seven billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-seven".