16361665 has 8 divisors (see below), whose sum is σ = 20113128. Its totient is φ = 12769920.

The previous prime is 16361651. The next prime is 16361693. The reversal of 16361665 is 56616361.

16361665 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 2163841 + 14197824 = 1471^2 + 3768^2 .

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

It is not a de Polignac number, because 16361665 - 2¹¹ = 16359617 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16361665.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39702 + ... + 40111.

It is an arithmetic number, because the mean of its divisors is an integer number (2514141).

Almost surely, 2^16361665 is an apocalyptic number.

It is an amenable number.

16361665 is a deficient number, since it is larger than the sum of its proper divisors (3751463).

16361665 is an equidigital number, since it uses as much as digits as its factorization.

16361665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79859.

The product of its digits is 19440, while the sum is 34.

The square root of 16361665 is about 4044.9555003733. The cubic root of 16361665 is about 253.8687037136.

The spelling of 16361665 in words is "sixteen million, three hundred sixty-one thousand, six hundred sixty-five".