66170893 has 4 divisors (see below), whose sum is σ = 66304000. Its totient is φ = 66037788.

The previous prime is 66170887. The next prime is 66170917. The reversal of 66170893 is 39807166.

66170893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 66170893 - 2⁵ = 66170861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66170693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65805 + ... + 66802.

It is an arithmetic number, because the mean of its divisors is an integer number (16576000).

Almost surely, 2^66170893 is an apocalyptic number.

It is an amenable number.

66170893 is a deficient number, since it is larger than the sum of its proper divisors (133107).

66170893 is a wasteful number, since it uses less digits than its factorization.

66170893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133106.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 66170893 is about 8134.5493421578. The cubic root of 66170893 is about 404.4724992419.

The spelling of 66170893 in words is "sixty-six million, one hundred seventy thousand, eight hundred ninety-three".