80655611 has 2 divisors, whose sum is σ = 80655612. Its totient is φ = 80655610.

The previous prime is 80655571. The next prime is 80655613. The reversal of 80655611 is 11655608.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80655611 is a prime.

Together with 80655613, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80655613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40327805 + 40327806.

It is an arithmetic number, because the mean of its divisors is an integer number (40327806).

Almost surely, 2^80655611 is an apocalyptic number.

80655611 is a deficient number, since it is larger than the sum of its proper divisors (1).

80655611 is an equidigital number, since it uses as much as digits as its factorization.

80655611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 80655611 is about 8980.8468977040. The cubic root of 80655611 is about 432.0607964133.

The spelling of 80655611 in words is "eighty million, six hundred fifty-five thousand, six hundred eleven".