600001666 has 8 divisors (see below), whose sum is σ = 981820944. Its totient is φ = 272728020.

The previous prime is 600001631. The next prime is 600001691. The reversal of 600001666 is 666100006.

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

It is a super-4 number, since 4×600001666⁴ (a number of 36 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 600001666.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13636380 + ... + 13636423.

It is an arithmetic number, because the mean of its divisors is an integer number (122727618).

Almost surely, 2^600001666 is an apocalyptic number.

600001666 is a deficient number, since it is larger than the sum of its proper divisors (381819278).

600001666 is a wasteful number, since it uses less digits than its factorization.

600001666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27272816.

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

The square root of 600001666 is about 24494.9314348908. The cubic root of 600001666 is about 843.4334459448.

The spelling of 600001666 in words is "six hundred million, one thousand, six hundred sixty-six".