65444761 has 2 divisors, whose sum is σ = 65444762. Its totient is φ = 65444760.

The previous prime is 65444737. The next prime is 65444777. The reversal of 65444761 is 16744456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51337225 + 14107536 = 7165^2 + 3756^2 .

It is a cyclic number.

It is not a de Polignac number, because 65444761 - 2¹⁵ = 65411993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65444761.

It is not a weakly prime, because it can be changed into another prime (65444711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32722380 + 32722381.

It is an arithmetic number, because the mean of its divisors is an integer number (32722381).

Almost surely, 2^65444761 is an apocalyptic number.

It is an amenable number.

65444761 is a deficient number, since it is larger than the sum of its proper divisors (1).

65444761 is an equidigital number, since it uses as much as digits as its factorization.

65444761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 37.

The square root of 65444761 is about 8089.7936314841. The cubic root of 65444761 is about 402.9875495664.

The spelling of 65444761 in words is "sixty-five million, four hundred forty-four thousand, seven hundred sixty-one".