65927021 has 2 divisors, whose sum is σ = 65927022. Its totient is φ = 65927020.

The previous prime is 65927009. The next prime is 65927047. The reversal of 65927021 is 12072956.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58690921 + 7236100 = 7661^2 + 2690^2 .

It is a cyclic number.

It is not a de Polignac number, because 65927021 - 2¹⁰ = 65925997 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65924021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32963510 + 32963511.

It is an arithmetic number, because the mean of its divisors is an integer number (32963511).

Almost surely, 2^65927021 is an apocalyptic number.

It is an amenable number.

65927021 is a deficient number, since it is larger than the sum of its proper divisors (1).

65927021 is an equidigital number, since it uses as much as digits as its factorization.

65927021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 65927021 is about 8119.5456153654. The cubic root of 65927021 is about 403.9749947762.

Adding to 65927021 its reverse (12072956), we get a palindrome (77999977).

The spelling of 65927021 in words is "sixty-five million, nine hundred twenty-seven thousand, twenty-one".