667272733 has 2 divisors, whose sum is σ = 667272734. Its totient is φ = 667272732.

The previous prime is 667272721. The next prime is 667272743. The reversal of 667272733 is 337272766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 617174649 + 50098084 = 24843^2 + 7078^2 .

It is a cyclic number.

It is not a de Polignac number, because 667272733 - 2²⁵ = 633718301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667272733.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667272743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333636366 + 333636367.

It is an arithmetic number, because the mean of its divisors is an integer number (333636367).

Almost surely, 2^667272733 is an apocalyptic number.

It is an amenable number.

667272733 is a deficient number, since it is larger than the sum of its proper divisors (1).

667272733 is an equidigital number, since it uses as much as digits as its factorization.

667272733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 444528, while the sum is 43.

The square root of 667272733 is about 25831.6227326121. The cubic root of 667272733 is about 873.8451084112.

The spelling of 667272733 in words is "six hundred sixty-seven million, two hundred seventy-two thousand, seven hundred thirty-three".