671662 has 8 divisors (see below), whose sum is σ = 1032192. Its totient is φ = 327600.

The previous prime is 671651. The next prime is 671681. The reversal of 671662 is 266176.

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

It is a super-2 number, since 2×671662² = 902259684488, which contains 22 as substring.

It is an Ulam number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 671662.

It is a congruent number.

It is an unprimeable number.

671662 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 4014 + ... + 4177.

It is an arithmetic number, because the mean of its divisors is an integer number (129024).

2⁶⁷¹⁶⁶² is an apocalyptic number.

671662 is a deficient number, since it is larger than the sum of its proper divisors (360530).

671662 is a wasteful number, since it uses less digits than its factorization.

671662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8234.

The product of its digits is 3024, while the sum is 28.

The square root of 671662 is about 819.5498764566. The cubic root of 671662 is about 87.5756950426.

The spelling of 671662 in words is "six hundred seventy-one thousand, six hundred sixty-two".