668102011 has 8 divisors (see below), whose sum is σ = 687134448. Its totient is φ = 649200000.

The previous prime is 668101969. The next prime is 668102041. The reversal of 668102011 is 110201866.

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 668102011 - 2¹³ = 668093819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668102041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22170 + ... + 42751.

It is an arithmetic number, because the mean of its divisors is an integer number (85891806).

Almost surely, 2^668102011 is an apocalyptic number.

668102011 is a deficient number, since it is larger than the sum of its proper divisors (19032437).

668102011 is a wasteful number, since it uses less digits than its factorization.

668102011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65213.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 668102011 is about 25847.6693533479. The cubic root of 668102011 is about 874.2069597181.

Adding to 668102011 its reverse (110201866), we get a palindrome (778303877).

The spelling of 668102011 in words is "six hundred sixty-eight million, one hundred two thousand, eleven".