66331153 has 24 divisors (see below), whose sum is σ = 79950024. Its totient is φ = 54835200.

The previous prime is 66331151. The next prime is 66331159. The reversal of 66331153 is 35113366.

It can be written as a sum of positive squares in 4 ways, for example, as 5303809 + 61027344 = 2303^2 + 7812^2 .

It is not a de Polignac number, because 66331153 - 2¹ = 66331151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66331151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 275113 + ... + 275353.

It is an arithmetic number, because the mean of its divisors is an integer number (3331251).

Almost surely, 2^66331153 is an apocalyptic number.

It is an amenable number.

66331153 is a deficient number, since it is larger than the sum of its proper divisors (13618871).

66331153 is a wasteful number, since it uses less digits than its factorization.

66331153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433 (or 426 counting only the distinct ones).

The product of its digits is 4860, while the sum is 28.

The square root of 66331153 is about 8144.3939614928. The cubic root of 66331153 is about 404.7987680894.

The spelling of 66331153 in words is "sixty-six million, three hundred thirty-one thousand, one hundred fifty-three".