65576521 has 2 divisors, whose sum is σ = 65576522. Its totient is φ = 65576520.

The previous prime is 65576509. The next prime is 65576561. The reversal of 65576521 is 12567556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34339600 + 31236921 = 5860^2 + 5589^2 .

It is a cyclic number.

It is not a de Polignac number, because 65576521 - 2⁷ = 65576393 is a prime.

It is not a weakly prime, because it can be changed into another prime (65576561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32788260 + 32788261.

It is an arithmetic number, because the mean of its divisors is an integer number (32788261).

Almost surely, 2^65576521 is an apocalyptic number.

It is an amenable number.

65576521 is a deficient number, since it is larger than the sum of its proper divisors (1).

65576521 is an equidigital number, since it uses as much as digits as its factorization.

65576521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63000, while the sum is 37.

The square root of 65576521 is about 8097.9331313614. The cubic root of 65576521 is about 403.2578133465.

The spelling of 65576521 in words is "sixty-five million, five hundred seventy-six thousand, five hundred twenty-one".