7666606543 has 4 divisors (see below), whose sum is σ = 7667017848. Its totient is φ = 7666195240.

The previous prime is 7666606513. The next prime is 7666606567. The reversal of 7666606543 is 3456066667.

7666606543 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7666606543 - 2²⁵ = 7633052111 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7666606513) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 176296 + ... + 215437.

It is an arithmetic number, because the mean of its divisors is an integer number (1916754462).

Almost surely, 2^7666606543 is an apocalyptic number.

7666606543 is a deficient number, since it is larger than the sum of its proper divisors (411305).

7666606543 is a wasteful number, since it uses less digits than its factorization.

7666606543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411304.

The product of its (nonzero) digits is 3265920, while the sum is 49.

The square root of 7666606543 is about 87559.1602460873. The cubic root of 7666606543 is about 1971.8220787208.

The spelling of 7666606543 in words is "seven billion, six hundred sixty-six million, six hundred six thousand, five hundred forty-three".