65220647 has 2 divisors, whose sum is σ = 65220648. Its totient is φ = 65220646.

The previous prime is 65220641. The next prime is 65220667. The reversal of 65220647 is 74602256.

65220647 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 is a cyclic number.

It is not a de Polignac number, because 65220647 - 2¹² = 65216551 is a prime.

It is equal to p_3852752 and since 65220647 and 3852752 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65220641) 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, 32610323 + 32610324.

It is an arithmetic number, because the mean of its divisors is an integer number (32610324).

Almost surely, 2^65220647 is an apocalyptic number.

65220647 is a deficient number, since it is larger than the sum of its proper divisors (1).

65220647 is an equidigital number, since it uses as much as digits as its factorization.

65220647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 65220647 is about 8075.9301012329. The cubic root of 65220647 is about 402.5270164343.

The spelling of 65220647 in words is "sixty-five million, two hundred twenty thousand, six hundred forty-seven".