446663681 has 2 divisors, whose sum is σ = 446663682. Its totient is φ = 446663680.

The previous prime is 446663671. The next prime is 446663719. The reversal of 446663681 is 186366644.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 393665281 + 52998400 = 19841^2 + 7280^2 .

It is a cyclic number.

It is not a de Polignac number, because 446663681 - 2¹⁸ = 446401537 is a prime.

It is a super-2 number, since 2×446663681² = 399016887848939522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (446663621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223331840 + 223331841.

It is an arithmetic number, because the mean of its divisors is an integer number (223331841).

Almost surely, 2^446663681 is an apocalyptic number.

It is an amenable number.

446663681 is a deficient number, since it is larger than the sum of its proper divisors (1).

446663681 is an equidigital number, since it uses as much as digits as its factorization.

446663681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 44.

The square root of 446663681 is about 21134.4193438098. The cubic root of 446663681 is about 764.4109159118.

The spelling of 446663681 in words is "four hundred forty-six million, six hundred sixty-three thousand, six hundred eighty-one".