66445323 has 12 divisors (see below), whose sum is σ = 103058280. Its totient is φ = 37968672.

The previous prime is 66445289. The next prime is 66445361. The reversal of 66445323 is 32354466.

It is not a de Polignac number, because 66445323 - 2⁶ = 66445259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66445373) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 225858 + ... + 226151.

It is an arithmetic number, because the mean of its divisors is an integer number (8588190).

Almost surely, 2^66445323 is an apocalyptic number.

66445323 is a deficient number, since it is larger than the sum of its proper divisors (36612957).

66445323 is a wasteful number, since it uses less digits than its factorization.

66445323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452026 (or 452019 counting only the distinct ones).

The product of its digits is 51840, while the sum is 33.

The square root of 66445323 is about 8151.4000637927. The cubic root of 66445323 is about 405.0308831807.

Adding to 66445323 its reverse (32354466), we get a palindrome (98799789).

The spelling of 66445323 in words is "sixty-six million, four hundred forty-five thousand, three hundred twenty-three".