668025853 has 4 divisors (see below), whose sum is σ = 728755488. Its totient is φ = 607296220.

The previous prime is 668025821. The next prime is 668025871. The reversal of 668025853 is 358520866.

It is a happy number.

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 668025853 - 2⁵ = 668025821 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 (668025653) 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, 30364801 + ... + 30364822.

It is an arithmetic number, because the mean of its divisors is an integer number (182188872).

Almost surely, 2^668025853 is an apocalyptic number.

It is an amenable number.

668025853 is a deficient number, since it is larger than the sum of its proper divisors (60729635).

668025853 is a wasteful number, since it uses less digits than its factorization.

668025853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60729634.

The product of its (nonzero) digits is 345600, while the sum is 43.

The square root of 668025853 is about 25846.1961031019. The cubic root of 668025853 is about 874.1737410466.

The spelling of 668025853 in words is "six hundred sixty-eight million, twenty-five thousand, eight hundred fifty-three".