65328661 has 2 divisors, whose sum is σ = 65328662. Its totient is φ = 65328660.

The previous prime is 65328617. The next prime is 65328667. The reversal of 65328661 is 16682356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64160100 + 1168561 = 8010^2 + 1081^2 .

It is a cyclic number.

It is not a de Polignac number, because 65328661 - 2²³ = 56940053 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65328661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65328667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32664330 + 32664331.

It is an arithmetic number, because the mean of its divisors is an integer number (32664331).

Almost surely, 2^65328661 is an apocalyptic number.

It is an amenable number.

65328661 is a deficient number, since it is larger than the sum of its proper divisors (1).

65328661 is an equidigital number, since it uses as much as digits as its factorization.

65328661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 37.

The square root of 65328661 is about 8082.6147378184. The cubic root of 65328661 is about 402.7491064990.

The spelling of 65328661 in words is "sixty-five million, three hundred twenty-eight thousand, six hundred sixty-one".