66797453 has 2 divisors, whose sum is σ = 66797454. Its totient is φ = 66797452.

The previous prime is 66797443. The next prime is 66797477. The reversal of 66797453 is 35479766.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39778249 + 27019204 = 6307^2 + 5198^2 .

It is a cyclic number.

It is not a de Polignac number, because 66797453 - 2¹⁴ = 66781069 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66797398 and 66797407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66797413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33398726 + 33398727.

It is an arithmetic number, because the mean of its divisors is an integer number (33398727).

Almost surely, 2^66797453 is an apocalyptic number.

It is an amenable number.

66797453 is a deficient number, since it is larger than the sum of its proper divisors (1).

66797453 is an equidigital number, since it uses as much as digits as its factorization.

66797453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 47.

The square root of 66797453 is about 8172.9708796740. The cubic root of 66797453 is about 405.7451161321.

The spelling of 66797453 in words is "sixty-six million, seven hundred ninety-seven thousand, four hundred fifty-three".