7666659090766 has 32 divisors (see below), whose sum is σ = 12812062536000. Its totient is φ = 3416334485760.

The previous prime is 7666659090749. The next prime is 7666659090767. The reversal of 7666659090766 is 6670909566667.

It is a super-2 number, since 2×7666659090766² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7666659090767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26753410 + ... + 27038458.

It is an arithmetic number, because the mean of its divisors is an integer number (400376954250).

Almost surely, 2^{7666659090766} is an apocalyptic number.

7666659090766 is a deficient number, since it is larger than the sum of its proper divisors (5145403445234).

7666659090766 is a wasteful number, since it uses less digits than its factorization.

7666659090766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320764.

The product of its (nonzero) digits is 925888320, while the sum is 73.

The spelling of 7666659090766 in words is "seven trillion, six hundred sixty-six billion, six hundred fifty-nine million, ninety thousand, seven hundred sixty-six".