660260453 has 4 divisors (see below), whose sum is σ = 669559968. Its totient is φ = 650960940.

The previous prime is 660260437. The next prime is 660260509. The reversal of 660260453 is 354062066.

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 660260453 - 2⁴ = 660260437 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 (660260423) 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, 4649651 + ... + 4649792.

It is an arithmetic number, because the mean of its divisors is an integer number (167389992).

Almost surely, 2^660260453 is an apocalyptic number.

It is an amenable number.

660260453 is a deficient number, since it is larger than the sum of its proper divisors (9299515).

660260453 is an equidigital number, since it uses as much as digits as its factorization.

660260453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9299514.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 660260453 is about 25695.5337169711. The cubic root of 660260453 is about 870.7732821809.

The spelling of 660260453 in words is "six hundred sixty million, two hundred sixty thousand, four hundred fifty-three".