64665730 has 16 divisors (see below), whose sum is σ = 116623224. Its totient is φ = 25816320.

The previous prime is 64665703. The next prime is 64665743. The reversal of 64665730 is 3756646.

64665730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 59768361 + 4897369 = 7731^2 + 2213^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64665730.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 567 + ... + 11386.

Almost surely, 2^64665730 is an apocalyptic number.

64665730 is a deficient number, since it is larger than the sum of its proper divisors (51957494).

64665730 is a wasteful number, since it uses less digits than its factorization.

64665730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12501.

The product of its (nonzero) digits is 90720, while the sum is 37.

The square root of 64665730 is about 8041.5004818753. The cubic root of 64665730 is about 401.3821561104.

The spelling of 64665730 in words is "sixty-four million, six hundred sixty-five thousand, seven hundred thirty".