66220441 has 8 divisors (see below), whose sum is σ = 76921664. Its totient is φ = 55829520.

The previous prime is 66220403. The next prime is 66220459. The reversal of 66220441 is 14402266.

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

It is a cyclic number.

It is not a de Polignac number, because 66220441 - 2⁹ = 66219929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66223441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77115 + ... + 77968.

It is an arithmetic number, because the mean of its divisors is an integer number (9615208).

Almost surely, 2^66220441 is an apocalyptic number.

66220441 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

66220441 is a deficient number, since it is larger than the sum of its proper divisors (10701223).

66220441 is a wasteful number, since it uses less digits than its factorization.

66220441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155151.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 66220441 is about 8137.5943005289. The cubic root of 66220441 is about 404.5734288322.

The spelling of 66220441 in words is "sixty-six million, two hundred twenty thousand, four hundred forty-one".