66372177133 has 2 divisors, whose sum is σ = 66372177134. Its totient is φ = 66372177132.

The previous prime is 66372177089. The next prime is 66372177161. The reversal of 66372177133 is 33177127366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56160468324 + 10211708809 = 236982^2 + 101053^2 .

It is a cyclic number.

It is not a de Polignac number, because 66372177133 - 2²¹ = 66370079981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66372172133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33186088566 + 33186088567.

It is an arithmetic number, because the mean of its divisors is an integer number (33186088567).

Almost surely, 2^66372177133 is an apocalyptic number.

It is an amenable number.

66372177133 is a deficient number, since it is larger than the sum of its proper divisors (1).

66372177133 is an equidigital number, since it uses as much as digits as its factorization.

66372177133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 666792, while the sum is 46.

The spelling of 66372177133 in words is "sixty-six billion, three hundred seventy-two million, one hundred seventy-seven thousand, one hundred thirty-three".