668703111 has 4 divisors (see below), whose sum is σ = 891604152. Its totient is φ = 445802072.

The previous prime is 668703107. The next prime is 668703121. The reversal of 668703111 is 111307866.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 668703111 - 2² = 668703107 is a prime.

It is a super-2 number, since 2×668703111² = 894327701322156642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668703121) 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, 111450516 + ... + 111450521.

It is an arithmetic number, because the mean of its divisors is an integer number (222901038).

Almost surely, 2^668703111 is an apocalyptic number.

668703111 is a deficient number, since it is larger than the sum of its proper divisors (222901041).

668703111 is a wasteful number, since it uses less digits than its factorization.

668703111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222901040.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 668703111 is about 25859.2944799351. The cubic root of 668703111 is about 874.4690595562.

The spelling of 668703111 in words is "six hundred sixty-eight million, seven hundred three thousand, one hundred eleven".