16668145 has 16 divisors (see below), whose sum is σ = 21631680. Its totient is φ = 12256704.

The previous prime is 16668137. The next prime is 16668209. The reversal of 16668145 is 54186661.

16668145 = T₄₄₀ + T₄₄₁ + ... + T₅₆₉.

It is a cyclic number.

It is not a de Polignac number, because 16668145 - 2³ = 16668137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22186 + ... + 22924.

It is an arithmetic number, because the mean of its divisors is an integer number (1351980).

Almost surely, 2^16668145 is an apocalyptic number.

It is an amenable number.

16668145 is a deficient number, since it is larger than the sum of its proper divisors (4963535).

16668145 is a wasteful number, since it uses less digits than its factorization.

16668145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104.

The product of its digits is 34560, while the sum is 37.

The square root of 16668145 is about 4082.6639587407. The cubic root of 16668145 is about 255.4440296464. Note that the first 3 decimals are identical.

The spelling of 16668145 in words is "sixteen million, six hundred sixty-eight thousand, one hundred forty-five".