65675521 has 2 divisors, whose sum is σ = 65675522. Its totient is φ = 65675520.

The previous prime is 65675513. The next prime is 65675531. The reversal of 65675521 is 12557656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35820225 + 29855296 = 5985^2 + 5464^2 .

It is a cyclic number.

It is not a de Polignac number, because 65675521 - 2³ = 65675513 is a prime.

It is not a weakly prime, because it can be changed into another prime (65675531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32837760 + 32837761.

It is an arithmetic number, because the mean of its divisors is an integer number (32837761).

Almost surely, 2^65675521 is an apocalyptic number.

It is an amenable number.

65675521 is a deficient number, since it is larger than the sum of its proper divisors (1).

65675521 is an equidigital number, since it uses as much as digits as its factorization.

65675521 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 65675521 is about 8104.0434969218. The cubic root of 65675521 is about 403.4606422939.

The spelling of 65675521 in words is "sixty-five million, six hundred seventy-five thousand, five hundred twenty-one".