66237824671 has 2 divisors, whose sum is σ = 66237824672. Its totient is φ = 66237824670.

The previous prime is 66237824663. The next prime is 66237824687. The reversal of 66237824671 is 17642873266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66237824671 - 2³ = 66237824663 is a prime.

It is a super-2 number, since 2×66237824671² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66237824621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33118912335 + 33118912336.

It is an arithmetic number, because the mean of its divisors is an integer number (33118912336).

Almost surely, 2^66237824671 is an apocalyptic number.

66237824671 is a deficient number, since it is larger than the sum of its proper divisors (1).

66237824671 is an equidigital number, since it uses as much as digits as its factorization.

66237824671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4064256, while the sum is 52.

The spelling of 66237824671 in words is "sixty-six billion, two hundred thirty-seven million, eight hundred twenty-four thousand, six hundred seventy-one".