668115 has 48 divisors (see below), whose sum is σ = 1395360. Its totient is φ = 302400.

The previous prime is 668111. The next prime is 668141. The reversal of 668115 is 511866.

668115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 668115 - 2² = 668111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (668111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6565 + ... + 6665.

It is an arithmetic number, because the mean of its divisors is an integer number (29070).

2⁶⁶⁸¹¹⁵ is an apocalyptic number.

668115 is an abundant number, since it is smaller than the sum of its proper divisors (727245).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668115 is a wasteful number, since it uses less digits than its factorization.

668115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 116 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 668115 is about 817.3830191532. The cubic root of 668115 is about 87.4212625021.

It can be divided in two parts, 6 and 68115, that added together give a square (68121 = 261²).

The spelling of 668115 in words is "six hundred sixty-eight thousand, one hundred fifteen".