668061 has 16 divisors (see below), whose sum is σ = 1003200. Its totient is φ = 439344.

The previous prime is 668051. The next prime is 668069. The reversal of 668061 is 160866.

668061 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 668061 - 2⁵ = 668029 is a prime.

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

It is a plaindrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 668061.

It is not an unprimeable number, because it can be changed into a prime (668069) 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, 2830 + ... + 3056.

It is an arithmetic number, because the mean of its divisors is an integer number (62700).

2⁶⁶⁸⁰⁶¹ is an apocalyptic number.

It is an amenable number.

668061 is a deficient number, since it is larger than the sum of its proper divisors (335139).

668061 is a wasteful number, since it uses less digits than its factorization.

668061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 668061 is about 817.3499862360. The cubic root of 668061 is about 87.4189071813.

The spelling of 668061 in words is "six hundred sixty-eight thousand, sixty-one".