667308133 has 2 divisors, whose sum is σ = 667308134. Its totient is φ = 667308132.

The previous prime is 667308127. The next prime is 667308143. The reversal of 667308133 is 331803766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 574417089 + 92891044 = 23967^2 + 9638^2 .

It is a cyclic number.

It is not a de Polignac number, because 667308133 - 2⁹ = 667307621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 667308092 and 667308101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667308143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333654066 + 333654067.

It is an arithmetic number, because the mean of its divisors is an integer number (333654067).

Almost surely, 2^667308133 is an apocalyptic number.

It is an amenable number.

667308133 is a deficient number, since it is larger than the sum of its proper divisors (1).

667308133 is an equidigital number, since it uses as much as digits as its factorization.

667308133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 667308133 is about 25832.3079301870. The cubic root of 667308133 is about 873.8605611481.

The spelling of 667308133 in words is "six hundred sixty-seven million, three hundred eight thousand, one hundred thirty-three".