65732621 has 2 divisors, whose sum is σ = 65732622. Its totient is φ = 65732620.

The previous prime is 65732599. The next prime is 65732651. The reversal of 65732621 is 12623756.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36421225 + 29311396 = 6035^2 + 5414^2 .

It is a cyclic number.

It is not a de Polignac number, because 65732621 - 2¹⁸ = 65470477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65732651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32866310 + 32866311.

It is an arithmetic number, because the mean of its divisors is an integer number (32866311).

Almost surely, 2^65732621 is an apocalyptic number.

It is an amenable number.

65732621 is a deficient number, since it is larger than the sum of its proper divisors (1).

65732621 is an equidigital number, since it uses as much as digits as its factorization.

65732621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 32.

The square root of 65732621 is about 8107.5656642423. The cubic root of 65732621 is about 403.5775348035.

The spelling of 65732621 in words is "sixty-five million, seven hundred thirty-two thousand, six hundred twenty-one".