66937186871 has 2 divisors, whose sum is σ = 66937186872. Its totient is φ = 66937186870.

The previous prime is 66937186861. The next prime is 66937186891. The reversal of 66937186871 is 17868173966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66937186871 - 2¹⁸ = 66936924727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66937186861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33468593435 + 33468593436.

It is an arithmetic number, because the mean of its divisors is an integer number (33468593436).

Almost surely, 2^66937186871 is an apocalyptic number.

66937186871 is a deficient number, since it is larger than the sum of its proper divisors (1).

66937186871 is an equidigital number, since it uses as much as digits as its factorization.

66937186871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18289152, while the sum is 62.

The spelling of 66937186871 in words is "sixty-six billion, nine hundred thirty-seven million, one hundred eighty-six thousand, eight hundred seventy-one".