65711491 has 2 divisors, whose sum is σ = 65711492. Its totient is φ = 65711490.

The previous prime is 65711453. The next prime is 65711497. The reversal of 65711491 is 19411756.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65711491 - 2⁷ = 65711363 is a prime.

It is not a weakly prime, because it can be changed into another prime (65711497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32855745 + 32855746.

It is an arithmetic number, because the mean of its divisors is an integer number (32855746).

Almost surely, 2^65711491 is an apocalyptic number.

65711491 is a deficient number, since it is larger than the sum of its proper divisors (1).

65711491 is an equidigital number, since it uses as much as digits as its factorization.

65711491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 34.

The square root of 65711491 is about 8106.2624556574. The cubic root of 65711491 is about 403.5342863266.

The spelling of 65711491 in words is "sixty-five million, seven hundred eleven thousand, four hundred ninety-one".