66346249 has 2 divisors, whose sum is σ = 66346250. Its totient is φ = 66346248.

The previous prime is 66346219. The next prime is 66346253. The reversal of 66346249 is 94264366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65205625 + 1140624 = 8075^2 + 1068^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66346249 is a prime.

It is not a weakly prime, because it can be changed into another prime (66346219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33173124 + 33173125.

It is an arithmetic number, because the mean of its divisors is an integer number (33173125).

Almost surely, 2^66346249 is an apocalyptic number.

It is an amenable number.

66346249 is a deficient number, since it is larger than the sum of its proper divisors (1).

66346249 is an equidigital number, since it uses as much as digits as its factorization.

66346249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 40.

The square root of 66346249 is about 8145.3206812255. The cubic root of 66346249 is about 404.8294745192.

The spelling of 66346249 in words is "sixty-six million, three hundred forty-six thousand, two hundred forty-nine".