64000669 has 2 divisors, whose sum is σ = 64000670. Its totient is φ = 64000668.

The previous prime is 64000661. The next prime is 64000679. The reversal of 64000669 is 96600046.

64000669 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., 50765625 + 13235044 = 7125^2 + 3638^2 .

It is a cyclic number.

It is not a de Polignac number, because 64000669 - 2³ = 64000661 is a prime.

It is a super-2 number, since 2×64000669² = 8192171264895122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64000669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64000661) 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, 32000334 + 32000335.

It is an arithmetic number, because the mean of its divisors is an integer number (32000335).

Almost surely, 2^64000669 is an apocalyptic number.

It is an amenable number.

64000669 is a deficient number, since it is larger than the sum of its proper divisors (1).

64000669 is an equidigital number, since it uses as much as digits as its factorization.

64000669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 64000669 is about 8000.0418123907. The cubic root of 64000669 is about 400.0013937451.

The spelling of 64000669 in words is "sixty-four million, six hundred sixty-nine", and thus it is an aban number.