66452417 has 2 divisors, whose sum is σ = 66452418. Its totient is φ = 66452416.

The previous prime is 66452401. The next prime is 66452423. The reversal of 66452417 is 71425466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45144961 + 21307456 = 6719^2 + 4616^2 .

It is a cyclic number.

It is not a de Polignac number, because 66452417 - 2⁴ = 66452401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66152417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33226208 + 33226209.

It is an arithmetic number, because the mean of its divisors is an integer number (33226209).

Almost surely, 2^66452417 is an apocalyptic number.

It is an amenable number.

66452417 is a deficient number, since it is larger than the sum of its proper divisors (1).

66452417 is an equidigital number, since it uses as much as digits as its factorization.

66452417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 35.

The square root of 66452417 is about 8151.8351921515. The cubic root of 66452417 is about 405.0452969709.

The spelling of 66452417 in words is "sixty-six million, four hundred fifty-two thousand, four hundred seventeen".