66255673 has 4 divisors (see below), whose sum is σ = 72278928. Its totient is φ = 60232420.

The previous prime is 66255667. The next prime is 66255701. The reversal of 66255673 is 37655266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66255673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66255653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3011611 + ... + 3011632.

It is an arithmetic number, because the mean of its divisors is an integer number (18069732).

Almost surely, 2^66255673 is an apocalyptic number.

It is an amenable number.

66255673 is a deficient number, since it is larger than the sum of its proper divisors (6023255).

66255673 is a wasteful number, since it uses less digits than its factorization.

66255673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6023254.

The product of its digits is 226800, while the sum is 40.

The square root of 66255673 is about 8139.7587802096. The cubic root of 66255673 is about 404.6451660163.

The spelling of 66255673 in words is "sixty-six million, two hundred fifty-five thousand, six hundred seventy-three".