664453 has 4 divisors (see below), whose sum is σ = 671008. Its totient is φ = 657900.

The previous prime is 664441. The next prime is 664459. The reversal of 664453 is 354466.

664453 is nontrivially palindromic in base 15.

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 a cyclic number.

It is not a de Polignac number, because 664453 - 2⁵ = 664421 is a prime.

It is a Duffinian number.

664453 is an undulating number in base 15.

664453 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664459) 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, 3123 + ... + 3328.

It is an arithmetic number, because the mean of its divisors is an integer number (167752).

2⁶⁶⁴⁴⁵³ is an apocalyptic number.

It is an amenable number.

664453 is a deficient number, since it is larger than the sum of its proper divisors (6555).

664453 is a wasteful number, since it uses less digits than its factorization.

664453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6554.

The product of its digits is 8640, while the sum is 28.

The square root of 664453 is about 815.1398652992. The cubic root of 664453 is about 87.2612484574.

The spelling of 664453 in words is "six hundred sixty-four thousand, four hundred fifty-three".