667141121 has 2 divisors, whose sum is σ = 667141122. Its totient is φ = 667141120.

The previous prime is 667141073. The next prime is 667141133. The reversal of 667141121 is 121141766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 623051521 + 44089600 = 24961^2 + 6640^2 .

It is a cyclic number.

It is not a de Polignac number, because 667141121 - 2¹⁴ = 667124737 is a prime.

It is not a weakly prime, because it can be changed into another prime (667141621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333570560 + 333570561.

It is an arithmetic number, because the mean of its divisors is an integer number (333570561).

Almost surely, 2^667141121 is an apocalyptic number.

It is an amenable number.

667141121 is a deficient number, since it is larger than the sum of its proper divisors (1).

667141121 is an equidigital number, since it uses as much as digits as its factorization.

667141121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 29.

The square root of 667141121 is about 25829.0751092640. The cubic root of 667141121 is about 873.7876526120.

Adding to 667141121 its reverse (121141766), we get a palindrome (788282887).

The spelling of 667141121 in words is "six hundred sixty-seven million, one hundred forty-one thousand, one hundred twenty-one".