662667 has 4 divisors (see below), whose sum is σ = 883560. Its totient is φ = 441776.

The previous prime is 662657. The next prime is 662671. The reversal of 662667 is 766266.

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 662667 - 2⁷ = 662539 is a prime.

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 662667.

It is not an unprimeable number, because it can be changed into a prime (662617) 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, 110442 + ... + 110447.

It is an arithmetic number, because the mean of its divisors is an integer number (220890).

2⁶⁶²⁶⁶⁷ is an apocalyptic number.

662667 is a deficient number, since it is larger than the sum of its proper divisors (220893).

662667 is a wasteful number, since it uses less digits than its factorization.

662667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220892.

The product of its digits is 18144, while the sum is 33.

The square root of 662667 is about 814.0436106254. The cubic root of 662667 is about 87.1829943972.

The spelling of 662667 in words is "six hundred sixty-two thousand, six hundred sixty-seven".