66552838 has 8 divisors (see below), whose sum is σ = 108904680. Its totient is φ = 30251280.

The previous prime is 66552821. The next prime is 66552887. The reversal of 66552838 is 83825566.

It is a happy number.

66552838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 66552794 and 66552803.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1512543 + ... + 1512586.

It is an arithmetic number, because the mean of its divisors is an integer number (13613085).

Almost surely, 2^66552838 is an apocalyptic number.

66552838 is a deficient number, since it is larger than the sum of its proper divisors (42351842).

66552838 is a wasteful number, since it uses less digits than its factorization.

66552838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3025142.

The product of its digits is 345600, while the sum is 43.

The square root of 66552838 is about 8157.9922775153. The cubic root of 66552838 is about 405.2492252542.

It can be divided in two parts, 665528 and 38, that added together give a palindrome (665566).

The spelling of 66552838 in words is "sixty-six million, five hundred fifty-two thousand, eight hundred thirty-eight".