66255923 has 4 divisors (see below), whose sum is σ = 68540640. Its totient is φ = 63971208.

The previous prime is 66255913. The next prime is 66255949. The reversal of 66255923 is 32955266.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66255923 - 2⁶ = 66255859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66255913) 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 3 ways as a sum of consecutive naturals, for example, 1142315 + ... + 1142372.

It is an arithmetic number, because the mean of its divisors is an integer number (17135160).

Almost surely, 2^66255923 is an apocalyptic number.

66255923 is a deficient number, since it is larger than the sum of its proper divisors (2284717).

66255923 is a wasteful number, since it uses less digits than its factorization.

66255923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284716.

The product of its digits is 97200, while the sum is 38.

The square root of 66255923 is about 8139.7741369156. The cubic root of 66255923 is about 404.6456749597.

The spelling of 66255923 in words is "sixty-six million, two hundred fifty-five thousand, nine hundred twenty-three".