662643 has 24 divisors (see below), whose sum is σ = 1044576. Its totient is φ = 403200.

The previous prime is 662639. The next prime is 662647. The reversal of 662643 is 346266.

662643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (662639) and next prime (662647).

It is not a de Polignac number, because 662643 - 2² = 662639 is a prime.

662643 is a lucky number.

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 23 ways as a sum of consecutive naturals, for example, 9298 + ... + 9368.

It is an arithmetic number, because the mean of its divisors is an integer number (43524).

2⁶⁶²⁶⁴³ is an apocalyptic number.

662643 is a deficient number, since it is larger than the sum of its proper divisors (381933).

662643 is a wasteful number, since it uses less digits than its factorization.

662643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 152 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 662643 is about 814.0288692669. The cubic root of 662643 is about 87.1819418741.

The spelling of 662643 in words is "six hundred sixty-two thousand, six hundred forty-three".