601666 has 16 divisors (see below), whose sum is σ = 988344. Its totient is φ = 273024.

The previous prime is 601651. The next prime is 601669. The reversal of 601666 is 666106.

It can be written as a sum of positive squares in 4 ways, for example, as 275625 + 326041 = 525^2 + 571^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 601666.

It is not an unprimeable number, because it can be changed into a prime (601669) by changing a digit.

601666 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 7 ways as a sum of consecutive naturals, for example, 1740 + ... + 2056.

2⁶⁰¹⁶⁶⁶ is an apocalyptic number.

601666 is a deficient number, since it is larger than the sum of its proper divisors (386678).

601666 is a wasteful number, since it uses less digits than its factorization.

601666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 601666 is about 775.6713221462. The cubic root of 601666 is about 84.4212587674.

The spelling of 601666 in words is "six hundred one thousand, six hundred sixty-six".