671677 has 8 divisors (see below), whose sum is σ = 709632. Its totient is φ = 634800.

The previous prime is 671651. The next prime is 671681. The reversal of 671677 is 776176.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671677 is a prime.

It is a super-2 number, since 2×671677² = 902299984658, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1227 + ... + 1687.

It is an arithmetic number, because the mean of its divisors is an integer number (88704).

2⁶⁷¹⁶⁷⁷ is an apocalyptic number.

It is an amenable number.

671677 is a deficient number, since it is larger than the sum of its proper divisors (37955).

671677 is a wasteful number, since it uses less digits than its factorization.

671677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539.

The product of its digits is 12348, while the sum is 34.

The square root of 671677 is about 819.5590277704. The cubic root of 671677 is about 87.5763469705.

The spelling of 671677 in words is "six hundred seventy-one thousand, six hundred seventy-seven".