667682 has 8 divisors (see below), whose sum is σ = 1022976. Its totient is φ = 326692.

The previous prime is 667673. The next prime is 667687. The reversal of 667682 is 286766.

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

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (667687) by changing a digit.

667682 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3458 + ... + 3645.

It is an arithmetic number, because the mean of its divisors is an integer number (127872).

2⁶⁶⁷⁶⁸² is an apocalyptic number.

667682 is a deficient number, since it is larger than the sum of its proper divisors (355294).

667682 is a wasteful number, since it uses less digits than its factorization.

667682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7152.

The product of its digits is 24192, while the sum is 35.

The square root of 667682 is about 817.1181065183. The cubic root of 667682 is about 87.4023727465.

The spelling of 667682 in words is "six hundred sixty-seven thousand, six hundred eighty-two".