7668372738666 has 16 divisors (see below), whose sum is σ = 15477449565600. Its totient is φ = 2532673564848.

The previous prime is 7668372738643. The next prime is 7668372738701. The reversal of 7668372738666 is 6668372738667.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5862669636 + ... + 5862670943.

It is an arithmetic number, because the mean of its divisors is an integer number (967340597850).

Almost surely, 2^{7668372738666} is an apocalyptic number.

7668372738666 is an abundant number, since it is smaller than the sum of its proper divisors (7809076826934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7668372738666 is a wasteful number, since it uses less digits than its factorization.

7668372738666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11725340693.

The product of its digits is 3072577536, while the sum is 75.

Subtracting from 7668372738666 its reverse (6668372738667), we obtain a palindrome (999999999999).

The spelling of 7668372738666 in words is "seven trillion, six hundred sixty-eight billion, three hundred seventy-two million, seven hundred thirty-eight thousand, six hundred sixty-six".