6005666 has 4 divisors (see below), whose sum is σ = 9008502. Its totient is φ = 3002832.

The previous prime is 6005663. The next prime is 6005687. The reversal of 6005666 is 6665006.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6665006 = 2 ⋅3332503.

It can be written as a sum of positive squares in only one way, i.e., 5900041 + 105625 = 2429^2 + 325^2 .

It is not an unprimeable number, because it can be changed into a prime (6005663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1501415 + ... + 1501418.

Almost surely, 2^6005666 is an apocalyptic number.

6005666 is a deficient number, since it is larger than the sum of its proper divisors (3002836).

6005666 is a wasteful number, since it uses less digits than its factorization.

6005666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002835.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 6005666 is about 2450.6460372726. The cubic root of 6005666 is about 181.7692402059.

The spelling of 6005666 in words is "six million, five thousand, six hundred sixty-six".