66936173 has 4 divisors (see below), whose sum is σ = 67879008. Its totient is φ = 65993340.

The previous prime is 66936169. The next prime is 66936179. The reversal of 66936173 is 37163966.

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 not a de Polignac number, because 66936173 - 2² = 66936169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66936173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66936179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 471311 + ... + 471452.

It is an arithmetic number, because the mean of its divisors is an integer number (16969752).

Almost surely, 2^66936173 is an apocalyptic number.

It is an amenable number.

66936173 is a deficient number, since it is larger than the sum of its proper divisors (942835).

66936173 is an equidigital number, since it uses as much as digits as its factorization.

66936173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942834.

The product of its digits is 122472, while the sum is 41.

The square root of 66936173 is about 8181.4529883145. The cubic root of 66936173 is about 406.0257957192.

The spelling of 66936173 in words is "sixty-six million, nine hundred thirty-six thousand, one hundred seventy-three".