66375673 has 8 divisors (see below), whose sum is σ = 81693248. Its totient is φ = 52516944.

The previous prime is 66375671. The next prime is 66375689. The reversal of 66375673 is 37657366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66375673 - 2¹ = 66375671 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66375671) 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 7 ways as a sum of consecutive naturals, for example, 364611 + ... + 364792.

It is an arithmetic number, because the mean of its divisors is an integer number (10211656).

Almost surely, 2^66375673 is an apocalyptic number.

It is an amenable number.

66375673 is a deficient number, since it is larger than the sum of its proper divisors (15317575).

66375673 is a wasteful number, since it uses less digits than its factorization.

66375673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729423.

The product of its digits is 476280, while the sum is 43.

The square root of 66375673 is about 8147.1266714100. The cubic root of 66375673 is about 404.8893118231.

The spelling of 66375673 in words is "sixty-six million, three hundred seventy-five thousand, six hundred seventy-three".