66423145 has 8 divisors (see below), whose sum is σ = 83903040. Its totient is φ = 50341680.

The previous prime is 66423143. The next prime is 66423163. The reversal of 66423145 is 54132466.

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

It is not a de Polignac number, because 66423145 - 2¹ = 66423143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66423143) 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, 349501 + ... + 349690.

It is an arithmetic number, because the mean of its divisors is an integer number (10487880).

Almost surely, 2^66423145 is an apocalyptic number.

It is an amenable number.

66423145 is a deficient number, since it is larger than the sum of its proper divisors (17479895).

66423145 is a wasteful number, since it uses less digits than its factorization.

66423145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699215.

The product of its digits is 17280, while the sum is 31.

The square root of 66423145 is about 8150.0395704561. The cubic root of 66423145 is about 404.9858146736.

The spelling of 66423145 in words is "sixty-six million, four hundred twenty-three thousand, one hundred forty-five".