6656768676566 has 8 divisors (see below), whose sum is σ = 9988825385280. Its totient is φ = 3327160214808.

The previous prime is 6656768676563. The next prime is 6656768676577.

6656768676566 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6656768676563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612054941 + ... + 612065816.

It is an arithmetic number, because the mean of its divisors is an integer number (1248603173160).

Almost surely, 2^{6656768676566} is an apocalyptic number.

6656768676566 is a deficient number, since it is larger than the sum of its proper divisors (3332056708714).

6656768676566 is a wasteful number, since it uses less digits than its factorization.

6656768676566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224123478.

The product of its digits is 16460236800, while the sum is 80.

The spelling of 6656768676566 in words is "six trillion, six hundred fifty-six billion, seven hundred sixty-eight million, six hundred seventy-six thousand, five hundred sixty-six".