66472824697 has 2 divisors, whose sum is σ = 66472824698. Its totient is φ = 66472824696.

The previous prime is 66472824659. The next prime is 66472824709. The reversal of 66472824697 is 79642827466.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65951889721 + 520934976 = 256811^2 + 22824^2 .

It is a cyclic number.

It is not a de Polignac number, because 66472824697 - 2⁷ = 66472824569 is a prime.

It is not a weakly prime, because it can be changed into another prime (66472824617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33236412348 + 33236412349.

It is an arithmetic number, because the mean of its divisors is an integer number (33236412349).

Almost surely, 2^66472824697 is an apocalyptic number.

It is an amenable number.

66472824697 is a deficient number, since it is larger than the sum of its proper divisors (1).

66472824697 is an equidigital number, since it uses as much as digits as its factorization.

66472824697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48771072, while the sum is 61.

The spelling of 66472824697 in words is "sixty-six billion, four hundred seventy-two million, eight hundred twenty-four thousand, six hundred ninety-seven".