65550606 has 64 divisors (see below), whose sum is σ = 155623680. Its totient is φ = 18178560.

The previous prime is 65550599. The next prime is 65550607. The reversal of 65550606 is 60605556.

65550606 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65550607) 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 31 ways as a sum of consecutive naturals, for example, 40725 + ... + 42303.

It is an arithmetic number, because the mean of its divisors is an integer number (2431620).

Almost surely, 2^65550606 is an apocalyptic number.

65550606 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 65550606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77811840).

65550606 is an abundant number, since it is smaller than the sum of its proper divisors (90073074).

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

65550606 is a wasteful number, since it uses less digits than its factorization.

65550606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649.

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 65550606 is about 8096.3328735916. The cubic root of 65550606 is about 403.2046855756.

The spelling of 65550606 in words is "sixty-five million, five hundred fifty thousand, six hundred six".