662720 has 56 divisors (see below), whose sum is σ = 1676400. Its totient is φ = 248832.

The previous prime is 662719. The next prime is 662743. The reversal of 662720 is 27266.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6026 + ... + 6134.

2⁶⁶²⁷²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 662720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (838200).

662720 is an abundant number, since it is smaller than the sum of its proper divisors (1013680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

662720 is a wasteful number, since it uses less digits than its factorization.

662720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 662720 is about 814.0761635130. The cubic root of 662720 is about 87.1853186292.

Adding to 662720 its reverse (27266), we get a palindrome (689986).

It can be divided in two parts, 6 and 62720, that added together give a palindrome (62726).

The spelling of 662720 in words is "six hundred sixty-two thousand, seven hundred twenty".