667773 has 6 divisors (see below), whose sum is σ = 964574. Its totient is φ = 445176.

The previous prime is 667769. The next prime is 667781. The reversal of 667773 is 377766.

667773 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 356409 + 311364 = 597^2 + 558^2 .

It is not a de Polignac number, because 667773 - 2² = 667769 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667753) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37090 + ... + 37107.

2⁶⁶⁷⁷⁷³ is an apocalyptic number.

It is an amenable number.

667773 is a deficient number, since it is larger than the sum of its proper divisors (296801).

667773 is a wasteful number, since it uses less digits than its factorization.

667773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74203 (or 74200 counting only the distinct ones).

The product of its digits is 37044, while the sum is 36.

The square root of 667773 is about 817.1737881259. The cubic root of 667773 is about 87.4063433266.

The spelling of 667773 in words is "six hundred sixty-seven thousand, seven hundred seventy-three".