666453 has 4 divisors (see below), whose sum is σ = 888608. Its totient is φ = 444300.

The previous prime is 666439. The next prime is 666461. The reversal of 666453 is 354666.

666453 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is not a de Polignac number, because 666453 - 2⁴ = 666437 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 666453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666403) 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, 111073 + ... + 111078.

It is an arithmetic number, because the mean of its divisors is an integer number (222152).

2⁶⁶⁶⁴⁵³ is an apocalyptic number.

It is an amenable number.

666453 is a deficient number, since it is larger than the sum of its proper divisors (222155).

666453 is a wasteful number, since it uses less digits than its factorization.

666453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222154.

The product of its digits is 12960, while the sum is 30.

The square root of 666453 is about 816.3657268651. The cubic root of 666453 is about 87.3487127251.

The spelling of 666453 in words is "six hundred sixty-six thousand, four hundred fifty-three".