66186822851 has 2 divisors, whose sum is σ = 66186822852. Its totient is φ = 66186822850.

The previous prime is 66186822847. The next prime is 66186822859. The reversal of 66186822851 is 15822868166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66186822851 - 2² = 66186822847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66186822793 and 66186822802.

It is not a weakly prime, because it can be changed into another prime (66186822859) 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 as a sum of consecutive naturals, namely, 33093411425 + 33093411426.

It is an arithmetic number, because the mean of its divisors is an integer number (33093411426).

Almost surely, 2^66186822851 is an apocalyptic number.

66186822851 is a deficient number, since it is larger than the sum of its proper divisors (1).

66186822851 is an equidigital number, since it uses as much as digits as its factorization.

66186822851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2211840, while the sum is 53.

The spelling of 66186822851 in words is "sixty-six billion, one hundred eighty-six million, eight hundred twenty-two thousand, eight hundred fifty-one".