667175449 has 4 divisors (see below), whose sum is σ = 667296036. Its totient is φ = 667054864.

The previous prime is 667175447. The next prime is 667175471. The reversal of 667175449 is 944571766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 584092224 + 83083225 = 24168^2 + 9115^2 .

It is a cyclic number.

It is not a de Polignac number, because 667175449 - 2¹ = 667175447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667175447) 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, 51574 + ... + 63199.

It is an arithmetic number, because the mean of its divisors is an integer number (166824009).

Almost surely, 2^667175449 is an apocalyptic number.

It is an amenable number.

667175449 is a deficient number, since it is larger than the sum of its proper divisors (120587).

667175449 is a wasteful number, since it uses less digits than its factorization.

667175449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120586.

The product of its digits is 1270080, while the sum is 49.

The square root of 667175449 is about 25829.7396231553. The cubic root of 667175449 is about 873.8026393802.

The spelling of 667175449 in words is "six hundred sixty-seven million, one hundred seventy-five thousand, four hundred forty-nine".