66337254677 has 2 divisors, whose sum is σ = 66337254678. Its totient is φ = 66337254676.

The previous prime is 66337254673. The next prime is 66337254799. The reversal of 66337254677 is 77645273366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65799432196 + 537822481 = 256514^2 + 23191^2 .

It is a cyclic number.

It is not a de Polignac number, because 66337254677 - 2² = 66337254673 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66337254673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33168627338 + 33168627339.

It is an arithmetic number, because the mean of its divisors is an integer number (33168627339).

Almost surely, 2^66337254677 is an apocalyptic number.

It is an amenable number.

66337254677 is a deficient number, since it is larger than the sum of its proper divisors (1).

66337254677 is an equidigital number, since it uses as much as digits as its factorization.

66337254677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26671680, while the sum is 56.

The spelling of 66337254677 in words is "sixty-six billion, three hundred thirty-seven million, two hundred fifty-four thousand, six hundred seventy-seven".