16670890 has 16 divisors (see below), whose sum is σ = 30275208. Its totient is φ = 6608896.

The previous prime is 16670881. The next prime is 16670939. The reversal of 16670890 is 9807661.

It is a Cunningham number, because it is equal to 4083²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 8185321 + 8485569 = 2861^2 + 2913^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6247 + ... + 8506.

Almost surely, 2^16670890 is an apocalyptic number.

16670890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16670890 is a deficient number, since it is larger than the sum of its proper divisors (13604318).

16670890 is a wasteful number, since it uses less digits than its factorization.

16670890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14873.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 16670890 is about 4083.0001224590. Note that the first 3 decimals coincide. The cubic root of 16670890 is about 255.4580515101.

The spelling of 16670890 in words is "sixteen million, six hundred seventy thousand, eight hundred ninety".