665043453 has 40 divisors (see below), whose sum is σ = 1051635200. Its totient is φ = 417664512.

The previous prime is 665043443. The next prime is 665043469. The reversal of 665043453 is 354340566.

It is not a de Polignac number, because 665043453 - 2⁴ = 665043437 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 (665043433) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 295908 + ... + 298146.

It is an arithmetic number, because the mean of its divisors is an integer number (26290880).

Almost surely, 2^665043453 is an apocalyptic number.

It is an amenable number.

665043453 is a deficient number, since it is larger than the sum of its proper divisors (386591747).

665043453 is a wasteful number, since it uses less digits than its factorization.

665043453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2463 (or 2454 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

The square root of 665043453 is about 25788.4364202252. The cubic root of 665043453 is about 872.8708846496.

The spelling of 665043453 in words is "six hundred sixty-five million, forty-three thousand, four hundred fifty-three".