76655668 has 12 divisors (see below), whose sum is σ = 134208900. Its totient is φ = 38310272.

The previous prime is 76655641. The next prime is 76655681. The reversal of 76655668 is 86655667.

It can be written as a sum of positive squares in 2 ways, for example, as 16096144 + 60559524 = 4012^2 + 7782^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13830 + ... + 18562.

It is an arithmetic number, because the mean of its divisors is an integer number (11184075).

Almost surely, 2^76655668 is an apocalyptic number.

It is an amenable number.

76655668 is a deficient number, since it is larger than the sum of its proper divisors (57553232).

76655668 is a wasteful number, since it uses less digits than its factorization.

76655668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8786 (or 8784 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 49.

The square root of 76655668 is about 8755.3222670556. The cubic root of 76655668 is about 424.7969835449.

Subtracting 76655668 from its reverse (86655667), we obtain a palindrome (9999999).

The spelling of 76655668 in words is "seventy-six million, six hundred fifty-five thousand, six hundred sixty-eight".