1001666006 has 8 divisors (see below), whose sum is σ = 1639089864. Its totient is φ = 455302720.

The previous prime is 1001665991. The next prime is 1001666033. The reversal of 1001666006 is 6006661001.

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

It is a congruent number.

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, 22765115 + ... + 22765158.

It is an arithmetic number, because the mean of its divisors is an integer number (204886233).

Almost surely, 2^1001666006 is an apocalyptic number.

1001666006 is a deficient number, since it is larger than the sum of its proper divisors (637423858).

1001666006 is a wasteful number, since it uses less digits than its factorization.

1001666006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45530286.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1001666006 is about 31649.1075071636. The cubic root of 1001666006 is about 1000.5550272211. Note that the first 3 decimals are identical.

The spelling of 1001666006 in words is "one billion, one million, six hundred sixty-six thousand, six".