16645065 has 16 divisors (see below), whose sum is σ = 26744256. Its totient is φ = 8840000.

The previous prime is 16645061. The next prime is 16645081. The reversal of 16645065 is 56054661.

It is not a de Polignac number, because 16645065 - 2² = 16645061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16645061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1555 + ... + 5975.

It is an arithmetic number, because the mean of its divisors is an integer number (1671516).

Almost surely, 2^16645065 is an apocalyptic number.

16645065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16645065 is a deficient number, since it is larger than the sum of its proper divisors (10099191).

16645065 is a wasteful number, since it uses less digits than its factorization.

16645065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4680.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 16645065 is about 4079.8363937786. The cubic root of 16645065 is about 255.3260726794.

The spelling of 16645065 in words is "sixteen million, six hundred forty-five thousand, sixty-five".