64682709 has 32 divisors (see below), whose sum is σ = 109584384. Its totient is φ = 33013440.

The previous prime is 64682689. The next prime is 64682719. The reversal of 64682709 is 90728646.

It is not a de Polignac number, because 64682709 - 2⁷ = 64682581 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64682719) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4642 + ... + 12284.

It is an arithmetic number, because the mean of its divisors is an integer number (3424512).

Almost surely, 2^64682709 is an apocalyptic number.

It is an amenable number.

64682709 is a deficient number, since it is larger than the sum of its proper divisors (44901675).

64682709 is a wasteful number, since it uses less digits than its factorization.

64682709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7697.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 64682709 is about 8042.5561235219. The cubic root of 64682709 is about 401.4172827596.

The spelling of 64682709 in words is "sixty-four million, six hundred eighty-two thousand, seven hundred nine".