66635676311 has 4 divisors (see below), whose sum is σ = 67630238712. Its totient is φ = 65641113912.

The previous prime is 66635676307. The next prime is 66635676323. The reversal of 66635676311 is 11367653666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11367653666 = 2 ⋅5683826833.

It is a cyclic number.

It is not a de Polignac number, because 66635676311 - 2² = 66635676307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66635676311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66635676391) 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, 497281100 + ... + 497281233.

It is an arithmetic number, because the mean of its divisors is an integer number (16907559678).

Almost surely, 2^66635676311 is an apocalyptic number.

66635676311 is a deficient number, since it is larger than the sum of its proper divisors (994562401).

66635676311 is an equidigital number, since it uses as much as digits as its factorization.

66635676311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994562400.

The product of its digits is 2449440, while the sum is 50.

The spelling of 66635676311 in words is "sixty-six billion, six hundred thirty-five million, six hundred seventy-six thousand, three hundred eleven".