65642077 has 2 divisors, whose sum is σ = 65642078. Its totient is φ = 65642076.

The previous prime is 65642053. The next prime is 65642081. The reversal of 65642077 is 77024656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65626201 + 15876 = 8101^2 + 126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65642077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65642177) 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, 32821038 + 32821039.

It is an arithmetic number, because the mean of its divisors is an integer number (32821039).

Almost surely, 2^65642077 is an apocalyptic number.

It is an amenable number.

65642077 is a deficient number, since it is larger than the sum of its proper divisors (1).

65642077 is an equidigital number, since it uses as much as digits as its factorization.

65642077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 65642077 is about 8101.9798197724. The cubic root of 65642077 is about 403.3921458000.

The spelling of 65642077 in words is "sixty-five million, six hundred forty-two thousand, seventy-seven".