6666051011611 has 4 divisors (see below), whose sum is σ = 6666897287232. Its totient is φ = 6665204735992.

The previous prime is 6666051011533. The next prime is 6666051011657. The reversal of 6666051011611 is 1161101506666.

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

It is a cyclic number.

It is not a de Polignac number, because 6666051011611 - 2²³ = 6666042623003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6666051011671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423125995 + ... + 423141748.

It is an arithmetic number, because the mean of its divisors is an integer number (1666724321808).

Almost surely, 2^{6666051011611} is an apocalyptic number.

6666051011611 is a deficient number, since it is larger than the sum of its proper divisors (846275621).

6666051011611 is an equidigital number, since it uses as much as digits as its factorization.

6666051011611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846275620.

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 6666051011611 in words is "six trillion, six hundred sixty-six billion, fifty-one million, eleven thousand, six hundred eleven".