667575149 has 2 divisors, whose sum is σ = 667575150. Its totient is φ = 667575148.

The previous prime is 667575143. The next prime is 667575179. The reversal of 667575149 is 941575766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 641001124 + 26574025 = 25318^2 + 5155^2 .

It is a cyclic number.

It is not a de Polignac number, because 667575149 - 2¹² = 667571053 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 667575097 and 667575106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667575143) 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 as a sum of consecutive naturals, namely, 333787574 + 333787575.

It is an arithmetic number, because the mean of its divisors is an integer number (333787575).

Almost surely, 2^667575149 is an apocalyptic number.

It is an amenable number.

667575149 is a deficient number, since it is larger than the sum of its proper divisors (1).

667575149 is an equidigital number, since it uses as much as digits as its factorization.

667575149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1587600, while the sum is 50.

The square root of 667575149 is about 25837.4756700418. The cubic root of 667575149 is about 873.9771008319.

The spelling of 667575149 in words is "six hundred sixty-seven million, five hundred seventy-five thousand, one hundred forty-nine".