677671 has 4 divisors (see below), whose sum is σ = 717552. Its totient is φ = 637792.

The previous prime is 677657. The next prime is 677681. The reversal of 677671 is 176776.

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 677671 - 2⁵ = 677639 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 (677681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19915 + ... + 19948.

It is an arithmetic number, because the mean of its divisors is an integer number (179388).

2⁶⁷⁷⁶⁷¹ is an apocalyptic number.

677671 is a deficient number, since it is larger than the sum of its proper divisors (39881).

677671 is a wasteful number, since it uses less digits than its factorization.

677671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39880.

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

The square root of 677671 is about 823.2077502065. The cubic root of 677671 is about 87.8360843303.

It can be divided in two parts, 6 and 77671, that added together give a palindrome (77677).

The spelling of 677671 in words is "six hundred seventy-seven thousand, six hundred seventy-one".