64582661 has 12 divisors (see below), whose sum is σ = 76449996. Its totient is φ = 54193920.

The previous prime is 64582633. The next prime is 64582753. The reversal of 64582661 is 16628546.

64582661 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 2 ways, for example, as 7806436 + 56776225 = 2794^2 + 7535^2 .

It is not a de Polignac number, because 64582661 - 2¹⁸ = 64320517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64582601) 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 11 ways as a sum of consecutive naturals, for example, 18956 + ... + 22101.

It is an arithmetic number, because the mean of its divisors is an integer number (6370833).

Almost surely, 2^64582661 is an apocalyptic number.

It is an amenable number.

64582661 is a deficient number, since it is larger than the sum of its proper divisors (11867335).

64582661 is a wasteful number, since it uses less digits than its factorization.

64582661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41092 (or 41081 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 64582661 is about 8036.3338034206. Note that the first 3 decimals coincide. The cubic root of 64582661 is about 401.2102118588.

It can be divided in two parts, 6458 and 2661, that added together give a palindrome (9119).

The spelling of 64582661 in words is "sixty-four million, five hundred eighty-two thousand, six hundred sixty-one".