80666587 has 2 divisors, whose sum is σ = 80666588. Its totient is φ = 80666586.

The previous prime is 80666567. The next prime is 80666591. The reversal of 80666587 is 78566608.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80666587 - 2¹¹ = 80664539 is a prime.

It is not a weakly prime, because it can be changed into another prime (80666507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40333293 + 40333294.

It is an arithmetic number, because the mean of its divisors is an integer number (40333294).

Almost surely, 2^80666587 is an apocalyptic number.

80666587 is a deficient number, since it is larger than the sum of its proper divisors (1).

80666587 is an equidigital number, since it uses as much as digits as its factorization.

80666587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 80666587 is about 8981.4579551429. The cubic root of 80666587 is about 432.0803944885.

The spelling of 80666587 in words is "eighty million, six hundred sixty-six thousand, five hundred eighty-seven".