660453 has 4 divisors (see below), whose sum is σ = 880608. Its totient is φ = 440300.

The previous prime is 660449. The next prime is 660493. The reversal of 660453 is 354066.

660453 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 a cyclic number.

It is not a de Polignac number, because 660453 - 2² = 660449 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660403) 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, 110073 + ... + 110078.

It is an arithmetic number, because the mean of its divisors is an integer number (220152).

2⁶⁶⁰⁴⁵³ is an apocalyptic number.

It is an amenable number.

660453 is a deficient number, since it is larger than the sum of its proper divisors (220155).

660453 is a wasteful number, since it uses less digits than its factorization.

660453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220154.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 660453 is about 812.6825948671. The cubic root of 660453 is about 87.0857919734.

It can be divided in two parts, 66045 and 3, that multiplied together give a triangular number (198135 = T₆₂₉).

The spelling of 660453 in words is "six hundred sixty thousand, four hundred fifty-three".