662891 has 8 divisors (see below), whose sum is σ = 705600. Its totient is φ = 621000.

The previous prime is 662867. The next prime is 662897. The reversal of 662891 is 198266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-662891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (662897) 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 7 ways as a sum of consecutive naturals, for example, 2516 + ... + 2766.

It is an arithmetic number, because the mean of its divisors is an integer number (88200).

2⁶⁶²⁸⁹¹ is an apocalyptic number.

662891 is a deficient number, since it is larger than the sum of its proper divisors (42709).

662891 is a wasteful number, since it uses less digits than its factorization.

662891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409.

The product of its digits is 5184, while the sum is 32.

The square root of 662891 is about 814.1811837669. The cubic root of 662891 is about 87.1928167216.

The spelling of 662891 in words is "six hundred sixty-two thousand, eight hundred ninety-one".