667464073 has 2 divisors, whose sum is σ = 667464074. Its totient is φ = 667464072.

The previous prime is 667464037. The next prime is 667464079. The reversal of 667464073 is 370464766.

Together with previous prime (667464037) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 665794809 + 1669264 = 25803^2 + 1292^2 .

It is a cyclic number.

It is not a de Polignac number, because 667464073 - 2²⁹ = 130593161 is a prime.

It is not a weakly prime, because it can be changed into another prime (667464079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333732036 + 333732037.

It is an arithmetic number, because the mean of its divisors is an integer number (333732037).

Almost surely, 2^667464073 is an apocalyptic number.

It is an amenable number.

667464073 is a deficient number, since it is larger than the sum of its proper divisors (1).

667464073 is an equidigital number, since it uses as much as digits as its factorization.

667464073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 43.

The square root of 667464073 is about 25835.3260672282. The cubic root of 667464073 is about 873.9286252581.

The spelling of 667464073 in words is "six hundred sixty-seven million, four hundred sixty-four thousand, seventy-three".