66666592591111 has 4 divisors (see below), whose sum is σ = 66725641832800. Its totient is φ = 66607543349424.

The previous prime is 66666592591099. The next prime is 66666592591133. The reversal of 66666592591111 is 11119529566666.

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 66666592591111 - 2¹⁵ = 66666592558343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66666592591141) 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, 29524619151 + ... + 29524621408.

It is an arithmetic number, because the mean of its divisors is an integer number (16681410458200).

Almost surely, 2^{66666592591111} is an apocalyptic number.

66666592591111 is a deficient number, since it is larger than the sum of its proper divisors (59049241689).

66666592591111 is a wasteful number, since it uses less digits than its factorization.

66666592591111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59049241688.

The product of its digits is 31492800, while the sum is 64.

The spelling of 66666592591111 in words is "sixty-six trillion, six hundred sixty-six billion, five hundred ninety-two million, five hundred ninety-one thousand, one hundred eleven".