66144235 has 8 divisors (see below), whose sum is σ = 81933696. Its totient is φ = 51208320.

The previous prime is 66144233. The next prime is 66144241. The reversal of 66144235 is 53244166.

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

It is not a de Polignac number, because 66144235 - 2¹ = 66144233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66144197 and 66144206.

It is not an unprimeable number, because it can be changed into a prime (66144233) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 213214 + ... + 213523.

It is an arithmetic number, because the mean of its divisors is an integer number (10241712).

Almost surely, 2^66144235 is an apocalyptic number.

66144235 is a deficient number, since it is larger than the sum of its proper divisors (15789461).

66144235 is a wasteful number, since it uses less digits than its factorization.

66144235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426773.

The product of its digits is 17280, while the sum is 31.

The square root of 66144235 is about 8132.9106105994. The cubic root of 66144235 is about 404.4181758797.

The spelling of 66144235 in words is "sixty-six million, one hundred forty-four thousand, two hundred thirty-five".