65667541 has 2 divisors, whose sum is σ = 65667542. Its totient is φ = 65667540.

The previous prime is 65667533. The next prime is 65667557. The reversal of 65667541 is 14576656.

65667541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45900625 + 19766916 = 6775^2 + 4446^2 .

It is a cyclic number.

It is not a de Polignac number, because 65667541 - 2³ = 65667533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65667494 and 65667503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65667521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32833770 + 32833771.

It is an arithmetic number, because the mean of its divisors is an integer number (32833771).

Almost surely, 2^65667541 is an apocalyptic number.

It is an amenable number.

65667541 is a deficient number, since it is larger than the sum of its proper divisors (1).

65667541 is an equidigital number, since it uses as much as digits as its factorization.

65667541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 40.

The square root of 65667541 is about 8103.5511351506. The cubic root of 65667541 is about 403.4443006074. Note that the first 3 decimals are identical.

The spelling of 65667541 in words is "sixty-five million, six hundred sixty-seven thousand, five hundred forty-one".