7666366005 has 12 divisors (see below), whose sum is σ = 13288367820. Its totient is φ = 4088728512.

The previous prime is 7666365989. The next prime is 7666366007. The reversal of 7666366005 is 5006636667.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5598481329 + 2067884676 = 74823^2 + 45474^2 .

It is not a de Polignac number, because 7666366005 - 2⁴ = 7666365989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 170363689 = 7666366005 / (7 + 6 + 6 + 6 + 3 + 6 + 6 + 0 + 0 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7666366007) 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 11 ways as a sum of consecutive naturals, for example, 85181800 + ... + 85181889.

It is an arithmetic number, because the mean of its divisors is an integer number (1107363985).

Almost surely, 2^7666366005 is an apocalyptic number.

It is an amenable number.

7666366005 is a deficient number, since it is larger than the sum of its proper divisors (5622001815).

7666366005 is a wasteful number, since it uses less digits than its factorization.

7666366005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170363700 (or 170363697 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 45.

The square root of 7666366005 is about 87557.7866611531. The cubic root of 7666366005 is about 1971.8014566852.

It can be divided in two parts, 766636 and 6005, that added together give a square (772641 = 879²).

The spelling of 7666366005 in words is "seven billion, six hundred sixty-six million, three hundred sixty-six thousand, five".