662851 has 4 divisors (see below), whose sum is σ = 757552. Its totient is φ = 568152.

The previous prime is 662843. The next prime is 662867. The reversal of 662851 is 158266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 158266 = 2 ⋅79133.

It is a cyclic number.

It is not a de Polignac number, because 662851 - 2³ = 662843 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662251) 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, 47340 + ... + 47353.

It is an arithmetic number, because the mean of its divisors is an integer number (189388).

2⁶⁶²⁸⁵¹ is an apocalyptic number.

662851 is a deficient number, since it is larger than the sum of its proper divisors (94701).

662851 is an equidigital number, since it uses as much as digits as its factorization.

662851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94700.

The product of its digits is 2880, while the sum is 28.

The square root of 662851 is about 814.1566188394. The cubic root of 662851 is about 87.1910628974.

The spelling of 662851 in words is "six hundred sixty-two thousand, eight hundred fifty-one".