668118453 has 4 divisors (see below), whose sum is σ = 890824608. Its totient is φ = 445412300.

The previous prime is 668118433. The next prime is 668118463. The reversal of 668118453 is 354811866.

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 668118453 - 2⁶ = 668118389 is a prime.

It is a super-2 number, since 2×668118453² = 892764534478226418, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668118433) 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, 111353073 + ... + 111353078.

It is an arithmetic number, because the mean of its divisors is an integer number (222706152).

Almost surely, 2^668118453 is an apocalyptic number.

It is an amenable number.

668118453 is a deficient number, since it is larger than the sum of its proper divisors (222706155).

668118453 is a wasteful number, since it uses less digits than its factorization.

668118453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222706154.

The product of its digits is 138240, while the sum is 42.

The square root of 668118453 is about 25847.9874071464. The cubic root of 668118453 is about 874.2141310745.

The spelling of 668118453 in words is "six hundred sixty-eight million, one hundred eighteen thousand, four hundred fifty-three".