80666567 has 2 divisors, whose sum is σ = 80666568. Its totient is φ = 80666566.

The previous prime is 80666539. The next prime is 80666587. The reversal of 80666567 is 76566608.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80666567 - 2¹⁴ = 80650183 is a prime.

It is a Chen prime.

It is a congruent number.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40333283 + 40333284.

It is an arithmetic number, because the mean of its divisors is an integer number (40333284).

Almost surely, 2^80666567 is an apocalyptic number.

80666567 is a deficient number, since it is larger than the sum of its proper divisors (1).

80666567 is an equidigital number, since it uses as much as digits as its factorization.

80666567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 80666567 is about 8981.4568417379. The cubic root of 80666567 is about 432.0803587794.

The spelling of 80666567 in words is "eighty million, six hundred sixty-six thousand, five hundred sixty-seven".