65544761 has 2 divisors, whose sum is σ = 65544762. Its totient is φ = 65544760.

The previous prime is 65544749. The next prime is 65544763. The reversal of 65544761 is 16744556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48372025 + 17172736 = 6955^2 + 4144^2 .

It is a cyclic number.

It is not a de Polignac number, because 65544761 - 2¹⁸ = 65282617 is a prime.

It is a super-2 number, since 2×65544761² = 8592231389094242, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 65544763, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (65544763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32772380 + 32772381.

It is an arithmetic number, because the mean of its divisors is an integer number (32772381).

Almost surely, 2^65544761 is an apocalyptic number.

It is an amenable number.

65544761 is a deficient number, since it is larger than the sum of its proper divisors (1).

65544761 is an equidigital number, since it uses as much as digits as its factorization.

65544761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 38.

The square root of 65544761 is about 8095.9718996548. The cubic root of 65544761 is about 403.1927009346.

The spelling of 65544761 in words is "sixty-five million, five hundred forty-four thousand, seven hundred sixty-one".