662871 has 16 divisors (see below), whose sum is σ = 984960. Its totient is φ = 393120.

The previous prime is 662867. The next prime is 662897. The reversal of 662871 is 178266.

It is a happy number.

It is not a de Polignac number, because 662871 - 2² = 662867 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1560 + ... + 1938.

It is an arithmetic number, because the mean of its divisors is an integer number (61560).

2⁶⁶²⁸⁷¹ is an apocalyptic number.

662871 is a deficient number, since it is larger than the sum of its proper divisors (322089).

662871 is a wasteful number, since it uses less digits than its factorization.

662871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446.

The product of its digits is 4032, while the sum is 30.

The square root of 662871 is about 814.1689013958. The cubic root of 662871 is about 87.1919398184.

The spelling of 662871 in words is "six hundred sixty-two thousand, eight hundred seventy-one".