668322071 has 8 divisors (see below), whose sum is σ = 708671664. Its totient is φ = 628087680.

The previous prime is 668322049. The next prime is 668322113. The reversal of 668322071 is 170223866.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 668322071 - 2⁶ = 668322007 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 (668322871) 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 7 ways as a sum of consecutive naturals, for example, 16700 + ... + 40193.

It is an arithmetic number, because the mean of its divisors is an integer number (88583958).

Almost surely, 2^668322071 is an apocalyptic number.

668322071 is a deficient number, since it is larger than the sum of its proper divisors (40349593).

668322071 is a wasteful number, since it uses less digits than its factorization.

668322071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57601.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 668322071 is about 25851.9258663644. The cubic root of 668322071 is about 874.3029315220.

The spelling of 668322071 in words is "six hundred sixty-eight million, three hundred twenty-two thousand, seventy-one".