668310001 has 4 divisors (see below), whose sum is σ = 707622372. Its totient is φ = 628997632.

The previous prime is 668309969. The next prime is 668310023. The reversal of 668310001 is 100013866.

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 189750625 + 478559376 = 13775^2 + 21876^2 .

It is a cyclic number.

It is not a de Polignac number, because 668310001 - 2⁵ = 668309969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668310301) 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, 19656160 + ... + 19656193.

It is an arithmetic number, because the mean of its divisors is an integer number (176905593).

Almost surely, 2^668310001 is an apocalyptic number.

It is an amenable number.

668310001 is a deficient number, since it is larger than the sum of its proper divisors (39312371).

668310001 is a wasteful number, since it uses less digits than its factorization.

668310001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39312370.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 668310001 is about 25851.6924204200. The cubic root of 668310001 is about 874.2976681415.

Adding to 668310001 its reverse (100013866), we get a palindrome (768323867).

The spelling of 668310001 in words is "six hundred sixty-eight million, three hundred ten thousand, one".