662623 has 4 divisors (see below), whose sum is σ = 713608. Its totient is φ = 611640.

The previous prime is 662617. The next prime is 662639. The reversal of 662623 is 326266.

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

It is a cyclic number.

It is not a de Polignac number, because 662623 - 2⁵ = 662591 is a prime.

It is a d-powerful number, because it can be written as 6 + 6² + 6² + 2⁵ + 2¹⁷ + 3¹² .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25473 + ... + 25498.

It is an arithmetic number, because the mean of its divisors is an integer number (178402).

2⁶⁶²⁶²³ is an apocalyptic number.

662623 is a deficient number, since it is larger than the sum of its proper divisors (50985).

662623 is a wasteful number, since it uses less digits than its factorization.

662623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50984.

The product of its digits is 2592, while the sum is 25.

The square root of 662623 is about 814.0165845976. The cubic root of 662623 is about 87.1810647520.

Adding to 662623 its reverse (326266), we get a palindrome (988889).

The spelling of 662623 in words is "six hundred sixty-two thousand, six hundred twenty-three".