664102249 has 2 divisors, whose sum is σ = 664102250. Its totient is φ = 664102248.

The previous prime is 664102223. The next prime is 664102259. The reversal of 664102249 is 942201466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 567964224 + 96138025 = 23832^2 + 9805^2 .

It is a cyclic number.

It is not a de Polignac number, because 664102249 - 2¹⁵ = 664069481 is a prime.

It is not a weakly prime, because it can be changed into another prime (664102259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332051124 + 332051125.

It is an arithmetic number, because the mean of its divisors is an integer number (332051125).

Almost surely, 2^664102249 is an apocalyptic number.

It is an amenable number.

664102249 is a deficient number, since it is larger than the sum of its proper divisors (1).

664102249 is an equidigital number, since it uses as much as digits as its factorization.

664102249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 664102249 is about 25770.1813924543. The cubic root of 664102249 is about 872.4589128524.

The spelling of 664102249 in words is "six hundred sixty-four million, one hundred two thousand, two hundred forty-nine".