668025111 has 16 divisors (see below), whose sum is σ = 962693984. Its totient is φ = 409601664.

The previous prime is 668025101. The next prime is 668025131. The reversal of 668025111 is 111520866.

It is not a de Polignac number, because 668025111 - 2¹⁸ = 667762967 is a prime.

It is a super-3 number, since 3×668025111³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668025101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20116 + ... + 41721.

It is an arithmetic number, because the mean of its divisors is an integer number (60168374).

Almost surely, 2^668025111 is an apocalyptic number.

668025111 is a deficient number, since it is larger than the sum of its proper divisors (294668873).

668025111 is a wasteful number, since it uses less digits than its factorization.

668025111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62130.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 668025111 is about 25846.1817489547. The cubic root of 668025111 is about 874.1734173879.

Adding to 668025111 its reverse (111520866), we get a palindrome (779545977).

The spelling of 668025111 in words is "six hundred sixty-eight million, twenty-five thousand, one hundred eleven".