65579971 has 2 divisors, whose sum is σ = 65579972. Its totient is φ = 65579970.

The previous prime is 65579903. The next prime is 65579981. The reversal of 65579971 is 17997556.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65579971 is a prime.

It is not a weakly prime, because it can be changed into another prime (65579981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32789985 + 32789986.

It is an arithmetic number, because the mean of its divisors is an integer number (32789986).

Almost surely, 2^65579971 is an apocalyptic number.

65579971 is a deficient number, since it is larger than the sum of its proper divisors (1).

65579971 is an equidigital number, since it uses as much as digits as its factorization.

65579971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 595350, while the sum is 49.

The square root of 65579971 is about 8098.1461458781. The cubic root of 65579971 is about 403.2648850598.

The spelling of 65579971 in words is "sixty-five million, five hundred seventy-nine thousand, nine hundred seventy-one".