66272144 has 20 divisors (see below), whose sum is σ = 128588124. Its totient is φ = 33088128.

The previous prime is 66272123. The next prime is 66272149. The reversal of 66272144 is 44127266.

It can be written as a sum of positive squares in 2 ways, for example, as 31225744 + 35046400 = 5588^2 + 5920^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66272144.

It is not an unprimeable number, because it can be changed into a prime (66272149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10154 + ... + 15350.

Almost surely, 2^66272144 is an apocalyptic number.

It is an amenable number.

66272144 is a deficient number, since it is larger than the sum of its proper divisors (62315980).

66272144 is a wasteful number, since it uses less digits than its factorization.

66272144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6002 (or 5996 counting only the distinct ones).

The product of its digits is 16128, while the sum is 32.

The square root of 66272144 is about 8140.7704795062. The cubic root of 66272144 is about 404.6786945078.

The spelling of 66272144 in words is "sixty-six million, two hundred seventy-two thousand, one hundred forty-four".