662399 has 4 divisors (see below), whose sum is σ = 673320. Its totient is φ = 651480.

The previous prime is 662369. The next prime is 662401. The reversal of 662399 is 993266.

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

It is not a de Polignac number, because 662399 - 2⁸ = 662143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5369 + ... + 5490.

It is an arithmetic number, because the mean of its divisors is an integer number (168330).

2⁶⁶²³⁹⁹ is an apocalyptic number.

662399 is a deficient number, since it is larger than the sum of its proper divisors (10921).

662399 is a wasteful number, since it uses less digits than its factorization.

662399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10920.

The product of its digits is 17496, while the sum is 35.

The square root of 662399 is about 813.8789836333. The cubic root of 662399 is about 87.1712397789.

The spelling of 662399 in words is "six hundred sixty-two thousand, three hundred ninety-nine".