6600666347566 has 8 divisors (see below), whose sum is σ = 9993532227480. Its totient is φ = 3269488938408.

The previous prime is 6600666347557. The next prime is 6600666347567. The reversal of 6600666347566 is 6657436660066.

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 (6600666347567) 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, 15422117421 + ... + 15422117848.

It is an arithmetic number, because the mean of its divisors is an integer number (1249191528435).

Almost surely, 2^{6600666347566} is an apocalyptic number.

6600666347566 is a deficient number, since it is larger than the sum of its proper divisors (3392865879914).

6600666347566 is a wasteful number, since it uses less digits than its factorization.

6600666347566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30844235378.

The product of its (nonzero) digits is 117573120, while the sum is 61.

The spelling of 6600666347566 in words is "six trillion, six hundred billion, six hundred sixty-six million, three hundred forty-seven thousand, five hundred sixty-six".