7666666666 has 8 divisors (see below), whose sum is σ = 11500641504. Its totient is φ = 3833119500.

The previous prime is 7666666607. The next prime is 7666666673. The reversal of 7666666666 is 6666666667.

It is a sphenic number, since it is the product of 3 distinct primes.

7666666666 is a modest number, since divided by 666666 gives 7666 as remainder.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57540 + ... + 136543.

It is an arithmetic number, because the mean of its divisors is an integer number (1437580188).

Almost surely, 2^7666666666 is an apocalyptic number.

7666666666 is a deficient number, since it is larger than the sum of its proper divisors (3833974838).

7666666666 is a wasteful number, since it uses less digits than its factorization.

7666666666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213836.

The product of its digits is 70543872, while the sum is 61.

The square root of 7666666666 is about 87559.5035732844. The cubic root of 7666666666 is about 1971.8272331764.

Subtracting from 7666666666 its reverse (6666666667), we obtain a palindrome (999999999).

The spelling of 7666666666 in words is "seven billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-six".