66570322453 has 2 divisors, whose sum is σ = 66570322454. Its totient is φ = 66570322452.

The previous prime is 66570322447. The next prime is 66570322463. The reversal of 66570322453 is 35422307566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66245493924 + 324828529 = 257382^2 + 18023^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66570322453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66570322463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33285161226 + 33285161227.

It is an arithmetic number, because the mean of its divisors is an integer number (33285161227).

Almost surely, 2^66570322453 is an apocalyptic number.

It is an amenable number.

66570322453 is a deficient number, since it is larger than the sum of its proper divisors (1).

66570322453 is an equidigital number, since it uses as much as digits as its factorization.

66570322453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 43.

The spelling of 66570322453 in words is "sixty-six billion, five hundred seventy million, three hundred twenty-two thousand, four hundred fifty-three".