80664673 has 2 divisors, whose sum is σ = 80664674. Its totient is φ = 80664672.

The previous prime is 80664593. The next prime is 80664679. The reversal of 80664673 is 37646608.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72301009 + 8363664 = 8503^2 + 2892^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80664673 is a prime.

It is not a weakly prime, because it can be changed into another prime (80664679) 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, 40332336 + 40332337.

It is an arithmetic number, because the mean of its divisors is an integer number (40332337).

Almost surely, 2^80664673 is an apocalyptic number.

It is an amenable number.

80664673 is a deficient number, since it is larger than the sum of its proper divisors (1).

80664673 is an equidigital number, since it uses as much as digits as its factorization.

80664673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 80664673 is about 8981.3514016544. The cubic root of 80664673 is about 432.0769770950.

The spelling of 80664673 in words is "eighty million, six hundred sixty-four thousand, six hundred seventy-three".