66741661411 has 16 divisors (see below), whose sum is σ = 71287603200. Its totient is φ = 62265490560.

The previous prime is 66741661379. The next prime is 66741661421. The reversal of 66741661411 is 11416614766.

It is a cyclic number.

It is not a de Polignac number, because 66741661411 - 2⁵ = 66741661379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66741661421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2514990 + ... + 2541388.

It is an arithmetic number, because the mean of its divisors is an integer number (4455475200).

Almost surely, 2^66741661411 is an apocalyptic number.

66741661411 is a deficient number, since it is larger than the sum of its proper divisors (4545941789).

66741661411 is a wasteful number, since it uses less digits than its factorization.

66741661411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27714.

The product of its digits is 145152, while the sum is 43.

It can be divided in two parts, 667416 and 61411, that added together give a palindrome (728827).

The spelling of 66741661411 in words is "sixty-six billion, seven hundred forty-one million, six hundred sixty-one thousand, four hundred eleven".