66254013401 has 2 divisors, whose sum is σ = 66254013402. Its totient is φ = 66254013400.

The previous prime is 66254013391. The next prime is 66254013421. The reversal of 66254013401 is 10431045266.

66254013401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65720449600 + 533563801 = 256360^2 + 23099^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66254013401 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 (66254013421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33127006700 + 33127006701.

It is an arithmetic number, because the mean of its divisors is an integer number (33127006701).

Almost surely, 2^66254013401 is an apocalyptic number.

It is an amenable number.

66254013401 is a deficient number, since it is larger than the sum of its proper divisors (1).

66254013401 is an equidigital number, since it uses as much as digits as its factorization.

66254013401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 66254013401 its reverse (10431045266), we get a palindrome (76685058667).

The spelling of 66254013401 in words is "sixty-six billion, two hundred fifty-four million, thirteen thousand, four hundred one".