65564077 has 2 divisors, whose sum is σ = 65564078. Its totient is φ = 65564076.

The previous prime is 65564047. The next prime is 65564113. The reversal of 65564077 is 77046556.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37197801 + 28366276 = 6099^2 + 5326^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65564077 is a prime.

It is a super-3 number, since 3×65564077³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65564047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32782038 + 32782039.

It is an arithmetic number, because the mean of its divisors is an integer number (32782039).

Almost surely, 2^65564077 is an apocalyptic number.

It is an amenable number.

65564077 is a deficient number, since it is larger than the sum of its proper divisors (1).

65564077 is an equidigital number, since it uses as much as digits as its factorization.

65564077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 176400, while the sum is 40.

The square root of 65564077 is about 8097.1647507013. The cubic root of 65564077 is about 403.2323039233.

The spelling of 65564077 in words is "sixty-five million, five hundred sixty-four thousand, seventy-seven".