66602 has 4 divisors (see below), whose sum is σ = 99906.
Its totient is φ = 33300.
The previous prime is 66601. The next prime is 66617. The reversal of 66602 is 20666.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20666 = 2 ⋅10333.
It can be written as a sum of positive squares in only one way, i.e., 52441 + 14161 = 229^2 + 119^2
It is not an unprimeable number, because it can be changed into a prime (66601) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16649 + ... + 16652.
266602 is an apocalyptic number.
66602 is a deficient number, since it is larger than the sum of its proper divisors (33304).
66602 is a wasteful number, since it uses less digits than its factorization.
66602 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 33303.
The product of its (nonzero) digits is 432, while the sum is 20.
The square root of 66602 is about 258.0736329035.
The cubic root of 66602 is about 40.5348985382.
The spelling of 66602 in words is "sixty-six thousand, six hundred two".