16667001 has 12 divisors (see below), whose sum is σ = 25926628. Its totient is φ = 10256544.

The previous prime is 16666997. The next prime is 16667003. The reversal of 16667001 is 10076661.

It can be written as a sum of positive squares in 2 ways, for example, as 10791225 + 5875776 = 3285^2 + 2424^2 .

It is not a de Polignac number, because 16667001 - 2² = 16666997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16667003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71110 + ... + 71343.

Almost surely, 2^16667001 is an apocalyptic number.

It is an amenable number.

16667001 is a deficient number, since it is larger than the sum of its proper divisors (9259627).

16667001 is a wasteful number, since it uses less digits than its factorization.

16667001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142472 (or 142469 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 16667001 is about 4082.5238517368. The cubic root of 16667001 is about 255.4381854717.

The spelling of 16667001 in words is "sixteen million, six hundred sixty-seven thousand, one".