66425971229 has 2 divisors, whose sum is σ = 66425971230. Its totient is φ = 66425971228.

The previous prime is 66425971211. The next prime is 66425971243. The reversal of 66425971229 is 92217952466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56847434329 + 9578536900 = 238427^2 + 97870^2 .

It is a cyclic number.

It is not a de Polignac number, because 66425971229 - 2⁸ = 66425970973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66425271229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33212985614 + 33212985615.

It is an arithmetic number, because the mean of its divisors is an integer number (33212985615).

Almost surely, 2^66425971229 is an apocalyptic number.

It is an amenable number.

66425971229 is a deficient number, since it is larger than the sum of its proper divisors (1).

66425971229 is an equidigital number, since it uses as much as digits as its factorization.

66425971229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 53.

The spelling of 66425971229 in words is "sixty-six billion, four hundred twenty-five million, nine hundred seventy-one thousand, two hundred twenty-nine".