64784665 has 16 divisors (see below), whose sum is σ = 85199040. Its totient is φ = 46899520.

The previous prime is 64784663. The next prime is 64784683. The reversal of 64784665 is 56648746.

64784665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64784665 - 2¹ = 64784663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64784663) 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 in 15 ways as a sum of consecutive naturals, for example, 9891 + ... + 15079.

It is an arithmetic number, because the mean of its divisors is an integer number (5324940).

Almost surely, 2^64784665 is an apocalyptic number.

It is an amenable number.

64784665 is a deficient number, since it is larger than the sum of its proper divisors (20414375).

64784665 is a wasteful number, since it uses less digits than its factorization.

64784665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5432.

The product of its digits is 967680, while the sum is 46.

The square root of 64784665 is about 8048.8921597944. The cubic root of 64784665 is about 401.6280831228.

The spelling of 64784665 in words is "sixty-four million, seven hundred eighty-four thousand, six hundred sixty-five".