7666516659 has 16 divisors (see below), whose sum is σ = 10559222784. Its totient is φ = 4942644000.

The previous prime is 7666516633. The next prime is 7666516679. The reversal of 7666516659 is 9566156667.

7666516659 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7666516659 - 2²⁸ = 7398081203 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7666516599 and 7666516608.

It is not an unprimeable number, because it can be changed into a prime (7666516609) 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, 106537 + ... + 163349.

It is an arithmetic number, because the mean of its divisors is an integer number (659951424).

Almost surely, 2^7666516659 is an apocalyptic number.

7666516659 is a deficient number, since it is larger than the sum of its proper divisors (2892706125).

7666516659 is a wasteful number, since it uses less digits than its factorization.

7666516659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58298.

The product of its digits is 12247200, while the sum is 57.

The square root of 7666516659 is about 87558.6469687603. The cubic root of 7666516659 is about 1971.8143727496.

The spelling of 7666516659 in words is "seven billion, six hundred sixty-six million, five hundred sixteen thousand, six hundred fifty-nine".