64786685 has 4 divisors (see below), whose sum is σ = 77744028. Its totient is φ = 51829344.

The previous prime is 64786679. The next prime is 64786703. The reversal of 64786685 is 58668746.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20124196 + 44662489 = 4486^2 + 6683^2 .

It is a cyclic number.

It is not a de Polignac number, because 64786685 - 2⁴ = 64786669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6478664 + ... + 6478673.

It is an arithmetic number, because the mean of its divisors is an integer number (19436007).

Almost surely, 2^64786685 is an apocalyptic number.

It is an amenable number.

64786685 is a deficient number, since it is larger than the sum of its proper divisors (12957343).

64786685 is a wasteful number, since it uses less digits than its factorization.

64786685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12957342.

The product of its digits is 1935360, while the sum is 50.

The square root of 64786685 is about 8049.0176419238. The cubic root of 64786685 is about 401.6322573632.

The spelling of 64786685 in words is "sixty-four million, seven hundred eighty-six thousand, six hundred eighty-five".