7660568650666 has 4 divisors (see below), whose sum is σ = 11490852976002. Its totient is φ = 3830284325332.

The previous prime is 7660568650601. The next prime is 7660568650727. The reversal of 7660568650666 is 6660568650667.

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

It can be written as a sum of positive squares in only one way, i.e., 5032749337641 + 2627819313025 = 2243379^2 + 1621055^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1915142162665 + ... + 1915142162668.

Almost surely, 2^{7660568650666} is an apocalyptic number.

7660568650666 is a deficient number, since it is larger than the sum of its proper divisors (3830284325336).

7660568650666 is a wasteful number, since it uses less digits than its factorization.

7660568650666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3830284325335.

The product of its (nonzero) digits is 391910400, while the sum is 67.

Subtracting from 7660568650666 its reverse (6660568650667), we obtain a palindrome (999999999999).

The spelling of 7660568650666 in words is "seven trillion, six hundred sixty billion, five hundred sixty-eight million, six hundred fifty thousand, six hundred sixty-six".