66465423 has 24 divisors (see below), whose sum is σ = 100533888. Its totient is φ = 42234192.

The previous prime is 66465397. The next prime is 66465433. The reversal of 66465423 is 32456466.

66465423 is a `hidden beast` number, since 6 + 646 + 5 + 4 + 2 + 3 = 666.

It is not a de Polignac number, because 66465423 - 2⁵ = 66465391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66465433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112936 + ... + 113522.

It is an arithmetic number, because the mean of its divisors is an integer number (4188912).

Almost surely, 2^66465423 is an apocalyptic number.

66465423 is a deficient number, since it is larger than the sum of its proper divisors (34068465).

66465423 is a wasteful number, since it uses less digits than its factorization.

66465423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163 (or 1160 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 66465423 is about 8152.6328876014. The cubic root of 66465423 is about 405.0717202661.

The spelling of 66465423 in words is "sixty-six million, four hundred sixty-five thousand, four hundred twenty-three".