667411181 has 8 divisors (see below), whose sum is σ = 671001144. Its totient is φ = 663828480.

The previous prime is 667411163. The next prime is 667411189. The reversal of 667411181 is 181114766.

It can be written as a sum of positive squares in 4 ways, for example, as 504721156 + 162690025 = 22466^2 + 12755^2 .

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 667411181 - 2⁶ = 667411117 is a prime.

It is a super-2 number, since 2×667411181² = 890875369047629522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667411189) 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, 329885 + ... + 331901.

It is an arithmetic number, because the mean of its divisors is an integer number (83875143).

Almost surely, 2^667411181 is an apocalyptic number.

It is an amenable number.

667411181 is a deficient number, since it is larger than the sum of its proper divisors (3589963).

667411181 is a wasteful number, since it uses less digits than its factorization.

667411181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3631.

The product of its digits is 8064, while the sum is 35.

The square root of 667411181 is about 25834.3024097807. The cubic root of 667411181 is about 873.9055403432.

The spelling of 667411181 in words is "six hundred sixty-seven million, four hundred eleven thousand, one hundred eighty-one".