66672175 has 6 divisors (see below), whose sum is σ = 82673528. Its totient is φ = 53337720.

The previous prime is 66672173. The next prime is 66672217. The reversal of 66672175 is 57127666.

It is a happy number.

It is not a de Polignac number, because 66672175 - 2¹ = 66672173 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 (66672173) 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 5 ways as a sum of consecutive naturals, for example, 1333419 + ... + 1333468.

Almost surely, 2^66672175 is an apocalyptic number.

66672175 is a deficient number, since it is larger than the sum of its proper divisors (16001353).

66672175 is a wasteful number, since it uses less digits than its factorization.

66672175 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2666897 (or 2666892 counting only the distinct ones).

The product of its digits is 105840, while the sum is 40.

The square root of 66672175 is about 8165.3031174599. The cubic root of 66672175 is about 405.4913003293.

The spelling of 66672175 in words is "sixty-six million, six hundred seventy-two thousand, one hundred seventy-five".