7766440480866 has 32 divisors (see below), whose sum is σ = 15751930291200. Its totient is φ = 2552306551760.

The previous prime is 7766440480861. The next prime is 7766440480873. The reversal of 7766440480866 is 6680840446677.

It is a junction number, because it is equal to n+sod(n) for n = 7766440480797 and 7766440480806.

It is not an unprimeable number, because it can be changed into a prime (7766440480861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31494475 + ... + 31740113.

It is an arithmetic number, because the mean of its divisors is an integer number (492247821600).

Almost surely, 2^{7766440480866} is an apocalyptic number.

7766440480866 is an abundant number, since it is smaller than the sum of its proper divisors (7985489810334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7766440480866 is a wasteful number, since it uses less digits than its factorization.

7766440480866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319934.

The product of its (nonzero) digits is 260112384, while the sum is 66.

The spelling of 7766440480866 in words is "seven trillion, seven hundred sixty-six billion, four hundred forty million, four hundred eighty thousand, eight hundred sixty-six".