662740 has 24 divisors (see below), whose sum is σ = 1499400. Its totient is φ = 244608.

The previous prime is 662719. The next prime is 662743. The reversal of 662740 is 47266.

It can be written as a sum of positive squares in 4 ways, for example, as 91204 + 571536 = 302^2 + 756^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662743) by changing a digit.

662740 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1015 + ... + 1534.

It is an arithmetic number, because the mean of its divisors is an integer number (62475).

2⁶⁶²⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

662740 is an abundant number, since it is smaller than the sum of its proper divisors (836660).

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

662740 is a wasteful number, since it uses less digits than its factorization.

662740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571 (or 2569 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 662740 is about 814.0884472832. The cubic root of 662740 is about 87.1861956657.

The spelling of 662740 in words is "six hundred sixty-two thousand, seven hundred forty".