66937186859 has 2 divisors, whose sum is σ = 66937186860. Its totient is φ = 66937186858.

The previous prime is 66937186819. The next prime is 66937186861. The reversal of 66937186859 is 95868173966.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66937186859 is a prime.

It is a super-3 number, since 3×66937186859³ (a number of 33 digits) contains 333 as substring.

It is a Sophie Germain prime.

Together with 66937186861, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66937186819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33468593429 + 33468593430.

It is an arithmetic number, because the mean of its divisors is an integer number (33468593430).

Almost surely, 2^66937186859 is an apocalyptic number.

66937186859 is a deficient number, since it is larger than the sum of its proper divisors (1).

66937186859 is an equidigital number, since it uses as much as digits as its factorization.

66937186859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 117573120, while the sum is 68.

The spelling of 66937186859 in words is "sixty-six billion, nine hundred thirty-seven million, one hundred eighty-six thousand, eight hundred fifty-nine".