7686765647 has 16 divisors (see below), whose sum is σ = 8849692800. Its totient is φ = 6603092640.

The previous prime is 7686765629. The next prime is 7686765661. The reversal of 7686765647 is 7465676867.

It is a cyclic number.

It is not a de Polignac number, because 7686765647 - 2¹⁰ = 7686764623 is a prime.

It is a super-2 number, since 2×7686765647² (a number of 21 digits) contains 22 as substring.

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 7686765647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7686765677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34028 + ... + 128574.

It is an arithmetic number, because the mean of its divisors is an integer number (553105800).

Almost surely, 2^7686765647 is an apocalyptic number.

7686765647 is a deficient number, since it is larger than the sum of its proper divisors (1162927153).

7686765647 is a wasteful number, since it uses less digits than its factorization.

7686765647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94966.

The product of its digits is 71124480, while the sum is 62.

The square root of 7686765647 is about 87674.2017186356. The cubic root of 7686765647 is about 1973.5488477648.

The spelling of 7686765647 in words is "seven billion, six hundred eighty-six million, seven hundred sixty-five thousand, six hundred forty-seven".