16000665 has 16 divisors (see below), whose sum is σ = 25738368. Its totient is φ = 8487936.

The previous prime is 16000627. The next prime is 16000667. The reversal of 16000665 is 56600061.

16000665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16000665 - 2⁸ = 16000409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16000667) 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, 132 + ... + 5658.

It is an arithmetic number, because the mean of its divisors is an integer number (1608648).

Almost surely, 2^16000665 is an apocalyptic number.

16000665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16000665 is a deficient number, since it is larger than the sum of its proper divisors (9737703).

16000665 is a wasteful number, since it uses less digits than its factorization.

16000665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5728.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 16000665 is about 4000.0831241363. The cubic root of 16000665 is about 251.9877009619.

The spelling of 16000665 in words is "sixteen million, six hundred sixty-five", and thus it is an aban number.