66236457 has 16 divisors (see below), whose sum is σ = 101053440. Its totient is φ = 37803792.

The previous prime is 66236449. The next prime is 66236473. The reversal of 66236457 is 75463266.

66236457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66236457 - 2³ = 66236449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66236497) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 24394 + ... + 26972.

It is an arithmetic number, because the mean of its divisors is an integer number (6315840).

Almost surely, 2^66236457 is an apocalyptic number.

It is an amenable number.

66236457 is a deficient number, since it is larger than the sum of its proper divisors (34816983).

66236457 is a wasteful number, since it uses less digits than its factorization.

66236457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3812.

The product of its digits is 181440, while the sum is 39.

The square root of 66236457 is about 8138.5783156519. The cubic root of 66236457 is about 404.6060427584.

The spelling of 66236457 in words is "sixty-six million, two hundred thirty-six thousand, four hundred fifty-seven".