65322661 has 2 divisors, whose sum is σ = 65322662. Its totient is φ = 65322660.

The previous prime is 65322623. The next prime is 65322671. The reversal of 65322661 is 16622356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60933636 + 4389025 = 7806^2 + 2095^2 .

It is a cyclic number.

It is not a de Polignac number, because 65322661 - 2⁷ = 65322533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65322601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32661330 + 32661331.

It is an arithmetic number, because the mean of its divisors is an integer number (32661331).

Almost surely, 2^65322661 is an apocalyptic number.

It is an amenable number.

65322661 is a deficient number, since it is larger than the sum of its proper divisors (1).

65322661 is an equidigital number, since it uses as much as digits as its factorization.

65322661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 31.

The square root of 65322661 is about 8082.2435622790. The cubic root of 65322661 is about 402.7367761855.

The spelling of 65322661 in words is "sixty-five million, three hundred twenty-two thousand, six hundred sixty-one".