662009 has 8 divisors (see below), whose sum is σ = 699840. Its totient is φ = 624976.

The previous prime is 662003. The next prime is 662021. The reversal of 662009 is 900266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 662009 - 2⁴ = 661993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

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 662009.

It is not an unprimeable number, because it can be changed into a prime (662003) 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 7 ways as a sum of consecutive naturals, for example, 2327 + ... + 2595.

It is an arithmetic number, because the mean of its divisors is an integer number (87480).

2⁶⁶²⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

662009 is a deficient number, since it is larger than the sum of its proper divisors (37831).

662009 is a wasteful number, since it uses less digits than its factorization.

662009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 662009 is about 813.6393549970. The cubic root of 662009 is about 87.1541285122.

The spelling of 662009 in words is "six hundred sixty-two thousand, nine".