66523143 has 8 divisors (see below), whose sum is σ = 88848000. Its totient is φ = 44273528.

The previous prime is 66523141. The next prime is 66523169. The reversal of 66523143 is 34132566.

66523143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 66523143 - 2¹ = 66523141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66523143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66523141) 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 7 ways as a sum of consecutive naturals, for example, 16713 + ... + 20306.

It is an arithmetic number, because the mean of its divisors is an integer number (11106000).

Almost surely, 2^66523143 is an apocalyptic number.

66523143 is a deficient number, since it is larger than the sum of its proper divisors (22324857).

66523143 is a wasteful number, since it uses less digits than its factorization.

66523143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37621.

The product of its digits is 12960, while the sum is 30.

The square root of 66523143 is about 8156.1720800876. The cubic root of 66523143 is about 405.1889439983.

It can be divided in two parts, 66523 and 143, that added together give a palindrome (66666).

The spelling of 66523143 in words is "sixty-six million, five hundred twenty-three thousand, one hundred forty-three".