668502147 has 8 divisors (see below), whose sum is σ = 892377280. Its totient is φ = 445147560.

The previous prime is 668502139. The next prime is 668502151. The reversal of 668502147 is 741205866.

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

It is not a de Polignac number, because 668502147 - 2³ = 668502139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668502127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127129 + ... + 132282.

It is an arithmetic number, because the mean of its divisors is an integer number (111547160).

Almost surely, 2^668502147 is an apocalyptic number.

668502147 is a deficient number, since it is larger than the sum of its proper divisors (223875133).

668502147 is a wasteful number, since it uses less digits than its factorization.

668502147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260273.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 668502147 is about 25855.4084670887. The cubic root of 668502147 is about 874.3814499704.

The spelling of 668502147 in words is "six hundred sixty-eight million, five hundred two thousand, one hundred forty-seven".