667677 has 8 divisors (see below), whose sum is σ = 894016. Its totient is φ = 443232.

The previous prime is 667673. The next prime is 667687. The reversal of 667677 is 776766.

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

It is not a de Polignac number, because 667677 - 2² = 667673 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 667677.

It is not an unprimeable number, because it can be changed into a prime (667673) 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, 1128 + ... + 1614.

It is an arithmetic number, because the mean of its divisors is an integer number (111752).

2⁶⁶⁷⁶⁷⁷ is an apocalyptic number.

It is an amenable number.

667677 is a deficient number, since it is larger than the sum of its proper divisors (226339).

667677 is a wasteful number, since it uses less digits than its factorization.

667677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947.

The product of its digits is 74088, while the sum is 39.

The square root of 667677 is about 817.1150469793. The cubic root of 667677 is about 87.4021545723.

The spelling of 667677 in words is "six hundred sixty-seven thousand, six hundred seventy-seven".