668467 has 4 divisors (see below), whose sum is σ = 670536. Its totient is φ = 666400.

The previous prime is 668417. The next prime is 668471. The reversal of 668467 is 764866.

668467 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-668467 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (668407) 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, 433 + ... + 1234.

It is an arithmetic number, because the mean of its divisors is an integer number (167634).

2⁶⁶⁸⁴⁶⁷ is an apocalyptic number.

668467 is a deficient number, since it is larger than the sum of its proper divisors (2069).

668467 is a wasteful number, since it uses less digits than its factorization.

668467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2068.

The product of its digits is 48384, while the sum is 37.

The square root of 668467 is about 817.5983121313. The cubic root of 668467 is about 87.4366125949.

The spelling of 668467 in words is "six hundred sixty-eight thousand, four hundred sixty-seven".