76655666 has 8 divisors (see below), whose sum is σ = 115040640. Its totient is φ = 38308788.

The previous prime is 76655641. The next prime is 76655681. The reversal of 76655666 is 66655667.

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

It is a super-2 number, since 2×76655666² = 11752182259807112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 76655666.

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, 3806 + ... + 12953.

It is an arithmetic number, because the mean of its divisors is an integer number (14380080).

Almost surely, 2^76655666 is an apocalyptic number.

76655666 is a deficient number, since it is larger than the sum of its proper divisors (38384974).

76655666 is a wasteful number, since it uses less digits than its factorization.

76655666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19048.

The product of its digits is 1360800, while the sum is 47.

The square root of 76655666 is about 8755.3221528394. The cubic root of 76655666 is about 424.7969798504.

Subtracting from 76655666 its reverse (66655667), we obtain a palindrome (9999999).

It can be divided in two parts, 7665 and 5666, that added together give a palindrome (13331).

The spelling of 76655666 in words is "seventy-six million, six hundred fifty-five thousand, six hundred sixty-six".