667602 has 40 divisors (see below), whose sum is σ = 1616076. Its totient is φ = 204768.

The previous prime is 667577. The next prime is 667631. The reversal of 667602 is 206766.

It can be written as a sum of positive squares in 2 ways, for example, as 531441 + 136161 = 729^2 + 369^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 1948 + ... + 2264.

2⁶⁶⁷⁶⁰² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667602, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (808038).

667602 is an abundant number, since it is smaller than the sum of its proper divisors (948474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667602 is a wasteful number, since it uses less digits than its factorization.

667602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 667602 is about 817.0691525202. The cubic root of 667602 is about 87.3988818286.

The spelling of 667602 in words is "six hundred sixty-seven thousand, six hundred two".