65738861 has 2 divisors, whose sum is σ = 65738862. Its totient is φ = 65738860.

The previous prime is 65738857. The next prime is 65738863. The reversal of 65738861 is 16883756.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34880836 + 30858025 = 5906^2 + 5555^2 .

It is a cyclic number.

It is not a de Polignac number, because 65738861 - 2² = 65738857 is a prime.

Together with 65738863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65738863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32869430 + 32869431.

It is an arithmetic number, because the mean of its divisors is an integer number (32869431).

Almost surely, 2^65738861 is an apocalyptic number.

It is an amenable number.

65738861 is a deficient number, since it is larger than the sum of its proper divisors (1).

65738861 is an equidigital number, since it uses as much as digits as its factorization.

65738861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 44.

The square root of 65738861 is about 8107.9504808552. The cubic root of 65738861 is about 403.5903049426.

The spelling of 65738861 in words is "sixty-five million, seven hundred thirty-eight thousand, eight hundred sixty-one".