65656444 has 48 divisors (see below), whose sum is σ = 137894400. Its totient is φ = 26744256.

The previous prime is 65656427. The next prime is 65656489. The reversal of 65656444 is 44465656.

It is a junction number, because it is equal to n+sod(n) for n = 65656397 and 65656406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173047 + ... + 173425.

It is an arithmetic number, because the mean of its divisors is an integer number (2872800).

Almost surely, 2^65656444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65656444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68947200).

65656444 is an abundant number, since it is smaller than the sum of its proper divisors (72237956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65656444 is a wasteful number, since it uses less digits than its factorization.

65656444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682 (or 680 counting only the distinct ones).

The product of its digits is 345600, while the sum is 40.

The square root of 65656444 is about 8102.8664064021. The cubic root of 65656444 is about 403.4215736327.

The spelling of 65656444 in words is "sixty-five million, six hundred fifty-six thousand, four hundred forty-four".