667308143 has 2 divisors, whose sum is σ = 667308144. Its totient is φ = 667308142.

The previous prime is 667308133. The next prime is 667308149. The reversal of 667308143 is 341803766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667308143 - 2⁴ = 667308127 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 667308097 and 667308106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667308149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333654071 + 333654072.

It is an arithmetic number, because the mean of its divisors is an integer number (333654072).

Almost surely, 2^667308143 is an apocalyptic number.

667308143 is a deficient number, since it is larger than the sum of its proper divisors (1).

667308143 is an equidigital number, since it uses as much as digits as its factorization.

667308143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 667308143 is about 25832.3081237430. The cubic root of 667308143 is about 873.8605655132.

The spelling of 667308143 in words is "six hundred sixty-seven million, three hundred eight thousand, one hundred forty-three".