16651345 has 8 divisors (see below), whose sum is σ = 20068776. Its totient is φ = 13262976.

The previous prime is 16651343. The next prime is 16651357. The reversal of 16651345 is 54315661.

16651345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 659344 + 15992001 = 812^2 + 3999^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16651345 - 2¹ = 16651343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16651343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5982 + ... + 8311.

It is an arithmetic number, because the mean of its divisors is an integer number (2508597).

Almost surely, 2^16651345 is an apocalyptic number.

It is an amenable number.

16651345 is a deficient number, since it is larger than the sum of its proper divisors (3417431).

16651345 is a wasteful number, since it uses less digits than its factorization.

16651345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14531.

The product of its digits is 10800, while the sum is 31.

The square root of 16651345 is about 4080.6059599035. The cubic root of 16651345 is about 255.3581792152.

The spelling of 16651345 in words is "sixteen million, six hundred fifty-one thousand, three hundred forty-five".