65722739 has 2 divisors, whose sum is σ = 65722740. Its totient is φ = 65722738.

The previous prime is 65722711. The next prime is 65722781. The reversal of 65722739 is 93722756.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65722739 - 2²⁰ = 64674163 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65722696 and 65722705.

It is not a weakly prime, because it can be changed into another prime (65722939) 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, 32861369 + 32861370.

It is an arithmetic number, because the mean of its divisors is an integer number (32861370).

Almost surely, 2^65722739 is an apocalyptic number.

65722739 is a deficient number, since it is larger than the sum of its proper divisors (1).

65722739 is an equidigital number, since it uses as much as digits as its factorization.

65722739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 41.

The square root of 65722739 is about 8106.9562105639. The cubic root of 65722739 is about 403.5573096702.

The spelling of 65722739 in words is "sixty-five million, seven hundred twenty-two thousand, seven hundred thirty-nine".