7776613685 has 8 divisors (see below), whose sum is σ = 9359629656. Its totient is φ = 6202828800.

The previous prime is 7776613667. The next prime is 7776613693. The reversal of 7776613685 is 5863166777.

It can be written as a sum of positive squares in 4 ways, for example, as 11303044 + 7765310641 = 3362^2 + 88121^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-7776613685 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7776613685.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2305916 + ... + 2309285.

It is an arithmetic number, because the mean of its divisors is an integer number (1169953707).

Almost surely, 2^7776613685 is an apocalyptic number.

It is an amenable number.

7776613685 is a deficient number, since it is larger than the sum of its proper divisors (1583015971).

7776613685 is a wasteful number, since it uses less digits than its factorization.

7776613685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4615543.

The product of its digits is 8890560, while the sum is 56.

The square root of 7776613685 is about 88185.1103361560. The cubic root of 7776613685 is about 1981.2084658471.

The spelling of 7776613685 in words is "seven billion, seven hundred seventy-six million, six hundred thirteen thousand, six hundred eighty-five".