671678 has 8 divisors (see below), whose sum is σ = 1151472. Its totient is φ = 287856.

The previous prime is 671651. The next prime is 671681. The reversal of 671678 is 876176.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23975 + ... + 24002.

It is an arithmetic number, because the mean of its divisors is an integer number (143934).

2⁶⁷¹⁶⁷⁸ is an apocalyptic number.

671678 is a deficient number, since it is larger than the sum of its proper divisors (479794).

671678 is a wasteful number, since it uses less digits than its factorization.

671678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47986.

The product of its digits is 14112, while the sum is 35.

The square root of 671678 is about 819.5596378544. The cubic root of 671678 is about 87.5763904320.

The spelling of 671678 in words is "six hundred seventy-one thousand, six hundred seventy-eight".