66937186907 has 2 divisors, whose sum is σ = 66937186908. Its totient is φ = 66937186906.

The previous prime is 66937186891. The next prime is 66937186933. The reversal of 66937186907 is 70968173966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66937186907 - 2⁴ = 66937186891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66937186907.

It is not a weakly prime, because it can be changed into another prime (66937186507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33468593453 + 33468593454.

It is an arithmetic number, because the mean of its divisors is an integer number (33468593454).

Almost surely, 2^66937186907 is an apocalyptic number.

66937186907 is a deficient number, since it is larger than the sum of its proper divisors (1).

66937186907 is an equidigital number, since it uses as much as digits as its factorization.

66937186907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20575296, while the sum is 62.

The spelling of 66937186907 in words is "sixty-six billion, nine hundred thirty-seven million, one hundred eighty-six thousand, nine hundred seven".