76666666666 has 4 divisors (see below), whose sum is σ = 115000000002. Its totient is φ = 38333333332.

The previous prime is 76666666597. The next prime is 76666666673. The reversal of 76666666666 is 66666666667.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 59914800625 + 16751866041 = 244775^2 + 129429^2 .

76666666666 is a modest number, since divided by 666666 gives 76666 as remainder.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19166666665 + ... + 19166666668.

Almost surely, 2^76666666666 is an apocalyptic number.

76666666666 is a deficient number, since it is larger than the sum of its proper divisors (38333333336).

76666666666 is a wasteful number, since it uses less digits than its factorization.

76666666666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38333333335.

The product of its digits is 423263232, while the sum is 67.

Subtracting from 76666666666 its reverse (66666666667), we obtain a palindrome (9999999999).

The spelling of 76666666666 in words is "seventy-six billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-six".