668232349 has 4 divisors (see below), whose sum is σ = 672488764. Its totient is φ = 663975936.

The previous prime is 668232329. The next prime is 668232359. The reversal of 668232349 is 943232866.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 183792249 + 484440100 = 13557^2 + 22010^2 .

It is a cyclic number.

It is not a de Polignac number, because 668232349 - 2⁷ = 668232221 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 (668232319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2127972 + ... + 2128285.

It is an arithmetic number, because the mean of its divisors is an integer number (168122191).

Almost surely, 2^668232349 is an apocalyptic number.

It is an amenable number.

668232349 is a deficient number, since it is larger than the sum of its proper divisors (4256415).

668232349 is a wasteful number, since it uses less digits than its factorization.

668232349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4256414.

The product of its digits is 373248, while the sum is 43.

The square root of 668232349 is about 25850.1905021994. The cubic root of 668232349 is about 874.2638048186.

The spelling of 668232349 in words is "six hundred sixty-eight million, two hundred thirty-two thousand, three hundred forty-nine".