668852245 has 8 divisors (see below), whose sum is σ = 802814040. Its totient is φ = 534954240.

The previous prime is 668852243. The next prime is 668852257. The reversal of 668852245 is 542258866.

It can be written as a sum of positive squares in 4 ways, for example, as 167495364 + 501356881 = 12942^2 + 22391^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 668852245 - 2¹ = 668852243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 668852195 and 668852204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668852243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11385 + ... + 38305.

It is an arithmetic number, because the mean of its divisors is an integer number (100351755).

Almost surely, 2^668852245 is an apocalyptic number.

It is an amenable number.

668852245 is a deficient number, since it is larger than the sum of its proper divisors (133961795).

668852245 is a wasteful number, since it uses less digits than its factorization.

668852245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31895.

The product of its digits is 921600, while the sum is 46.

The square root of 668852245 is about 25862.1778858626. The cubic root of 668852245 is about 874.5340626808.

The spelling of 668852245 in words is "six hundred sixty-eight million, eight hundred fifty-two thousand, two hundred forty-five".