7656111866 has 16 divisors (see below), whose sum is σ = 12369994728. Its totient is φ = 3532896000.

The previous prime is 7656111863. The next prime is 7656111877. The reversal of 7656111866 is 6681116567.

It can be written as a sum of positive squares in 4 ways, for example, as 7633691641 + 22420225 = 87371^2 + 4735^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7656111866.

It is not an unprimeable number, because it can be changed into a prime (7656111863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120566 + ... + 172766.

Almost surely, 2^7656111866 is an apocalyptic number.

7656111866 is a deficient number, since it is larger than the sum of its proper divisors (4713882862).

7656111866 is a wasteful number, since it uses less digits than its factorization.

7656111866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57857.

The product of its digits is 362880, while the sum is 47.

The square root of 7656111866 is about 87499.2106592968. The cubic root of 7656111866 is about 1970.9219375146.

The spelling of 7656111866 in words is "seven billion, six hundred fifty-six million, one hundred eleven thousand, eight hundred sixty-six".