64466609 has 2 divisors, whose sum is σ = 64466610. Its totient is φ = 64466608.

The previous prime is 64466599. The next prime is 64466629. The reversal of 64466609 is 90666446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44930209 + 19536400 = 6703^2 + 4420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64466609 is a prime.

It is not a weakly prime, because it can be changed into another prime (64466629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32233304 + 32233305.

It is an arithmetic number, because the mean of its divisors is an integer number (32233305).

Almost surely, 2^64466609 is an apocalyptic number.

It is an amenable number.

64466609 is a deficient number, since it is larger than the sum of its proper divisors (1).

64466609 is an equidigital number, since it uses as much as digits as its factorization.

64466609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 64466609 is about 8029.1101001294. The cubic root of 64466609 is about 400.9697491499.

The spelling of 64466609 in words is "sixty-four million, four hundred sixty-six thousand, six hundred nine".