66562323251 has 2 divisors, whose sum is σ = 66562323252. Its totient is φ = 66562323250.

The previous prime is 66562323229. The next prime is 66562323253. The reversal of 66562323251 is 15232326566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66562323251 - 2¹⁸ = 66562061107 is a prime.

Together with 66562323253, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66562323199 and 66562323208.

It is not a weakly prime, because it can be changed into another prime (66562323253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33281161625 + 33281161626.

It is an arithmetic number, because the mean of its divisors is an integer number (33281161626).

Almost surely, 2^66562323251 is an apocalyptic number.

66562323251 is a deficient number, since it is larger than the sum of its proper divisors (1).

66562323251 is an equidigital number, since it uses as much as digits as its factorization.

66562323251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 41.

The spelling of 66562323251 in words is "sixty-six billion, five hundred sixty-two million, three hundred twenty-three thousand, two hundred fifty-one".