667206773 has 2 divisors, whose sum is σ = 667206774. Its totient is φ = 667206772.

The previous prime is 667206737. The next prime is 667206833. The reversal of 667206773 is 377602766.

667206773 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (667206737) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 413186929 + 254019844 = 20327^2 + 15938^2 .

It is a cyclic number.

It is not a de Polignac number, because 667206773 - 2¹⁴ = 667190389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667206713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333603386 + 333603387.

It is an arithmetic number, because the mean of its divisors is an integer number (333603387).

Almost surely, 2^667206773 is an apocalyptic number.

It is an amenable number.

667206773 is a deficient number, since it is larger than the sum of its proper divisors (1).

667206773 is an equidigital number, since it uses as much as digits as its factorization.

667206773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 444528, while the sum is 44.

The square root of 667206773 is about 25830.3459713570. The cubic root of 667206773 is about 873.8163142267.

The spelling of 667206773 in words is "six hundred sixty-seven million, two hundred six thousand, seven hundred seventy-three".