6776887765 has 16 divisors (see below), whose sum is σ = 8424518400. Its totient is φ = 5227200832.

The previous prime is 6776887727. The next prime is 6776887807. The reversal of 6776887765 is 5677886776.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6776887765 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6776887765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71754 + ... + 136756.

It is an arithmetic number, because the mean of its divisors is an integer number (526532400).

Almost surely, 2^6776887765 is an apocalyptic number.

It is an amenable number.

6776887765 is a deficient number, since it is larger than the sum of its proper divisors (1647630635).

6776887765 is a wasteful number, since it uses less digits than its factorization.

6776887765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65756.

The product of its digits is 165957120, while the sum is 67.

The square root of 6776887765 is about 82321.8547227891. The cubic root of 6776887765 is about 1892.3876177705.

The spelling of 6776887765 in words is "six billion, seven hundred seventy-six million, eight hundred eighty-seven thousand, seven hundred sixty-five".