66846253 has 2 divisors, whose sum is σ = 66846254. Its totient is φ = 66846252.

The previous prime is 66846239. The next prime is 66846331. The reversal of 66846253 is 35264866.

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., 62773929 + 4072324 = 7923^2 + 2018^2 .

It is a cyclic number.

It is not a de Polignac number, because 66846253 - 2⁹ = 66845741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66846203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33423126 + 33423127.

It is an arithmetic number, because the mean of its divisors is an integer number (33423127).

Almost surely, 2^66846253 is an apocalyptic number.

It is an amenable number.

66846253 is a deficient number, since it is larger than the sum of its proper divisors (1).

66846253 is an equidigital number, since it uses as much as digits as its factorization.

66846253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 40.

The square root of 66846253 is about 8175.9557851055. The cubic root of 66846253 is about 405.8439000472.

The spelling of 66846253 in words is "sixty-six million, eight hundred forty-six thousand, two hundred fifty-three".