662645 has 4 divisors (see below), whose sum is σ = 795180. Its totient is φ = 530112.

The previous prime is 662639. The next prime is 662647. The reversal of 662645 is 546266.

662645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 244036 + 418609 = 494^2 + 647^2 .

It is a cyclic number.

It is not a de Polignac number, because 662645 - 2¹⁰ = 661621 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 662645.

It is not an unprimeable number, because it can be changed into a prime (662647) 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, 66260 + ... + 66269.

It is an arithmetic number, because the mean of its divisors is an integer number (198795).

2⁶⁶²⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

662645 is a deficient number, since it is larger than the sum of its proper divisors (132535).

662645 is a wasteful number, since it uses less digits than its factorization.

662645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132534.

The product of its digits is 8640, while the sum is 29.

The square root of 662645 is about 814.0300977237. The cubic root of 662645 is about 87.1820295853.

The spelling of 662645 in words is "six hundred sixty-two thousand, six hundred forty-five".