66201725140913 has 2 divisors, whose sum is σ = 66201725140914. Its totient is φ = 66201725140912.

The previous prime is 66201725140907. The next prime is 66201725141033. The reversal of 66201725140913 is 31904152710266.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65384964693409 + 816760447504 = 8086097^2 + 903748^2 .

It is a cyclic number.

It is not a de Polignac number, because 66201725140913 - 2⁴ = 66201725140897 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (66201725100913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33100862570456 + 33100862570457.

It is an arithmetic number, because the mean of its divisors is an integer number (33100862570457).

Almost surely, 2^{66201725140913} is an apocalyptic number.

It is an amenable number.

66201725140913 is a deficient number, since it is larger than the sum of its proper divisors (1).

66201725140913 is an equidigital number, since it uses as much as digits as its factorization.

66201725140913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 66201725140913 in words is "sixty-six trillion, two hundred one billion, seven hundred twenty-five million, one hundred forty thousand, nine hundred thirteen".