667453 has 4 divisors (see below), whose sum is σ = 669088. Its totient is φ = 665820.

The previous prime is 667441. The next prime is 667463. The reversal of 667453 is 354766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 354766 = 2 ⋅177383.

It is a cyclic number.

It is not a de Polignac number, because 667453 - 2⁵ = 667421 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 (667423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400 + ... + 1222.

It is an arithmetic number, because the mean of its divisors is an integer number (167272).

2⁶⁶⁷⁴⁵³ is an apocalyptic number.

It is an amenable number.

667453 is a deficient number, since it is larger than the sum of its proper divisors (1635).

667453 is an equidigital number, since it uses as much as digits as its factorization.

667453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634.

The product of its digits is 15120, while the sum is 31.

The square root of 667453 is about 816.9779678792. The cubic root of 667453 is about 87.3923792506.

The spelling of 667453 in words is "six hundred sixty-seven thousand, four hundred fifty-three".