16668151 has 4 divisors (see below), whose sum is σ = 16731792. Its totient is φ = 16604512.

The previous prime is 16668137. The next prime is 16668209. The reversal of 16668151 is 15186661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16668151 - 2²³ = 8279543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16668451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31426 + ... + 31951.

It is an arithmetic number, because the mean of its divisors is an integer number (4182948).

Almost surely, 2^16668151 is an apocalyptic number.

16668151 is a deficient number, since it is larger than the sum of its proper divisors (63641).

16668151 is an equidigital number, since it uses as much as digits as its factorization.

16668151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63640.

The product of its digits is 8640, while the sum is 34.

The square root of 16668151 is about 4082.6646935549. The cubic root of 16668151 is about 255.4440602970. Note that the first 3 decimals are identical.

The spelling of 16668151 in words is "sixteen million, six hundred sixty-eight thousand, one hundred fifty-one".