16610065 has 4 divisors (see below), whose sum is σ = 19932084. Its totient is φ = 13288048.

The previous prime is 16610051. The next prime is 16610101. The reversal of 16610065 is 56001661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56001661 = 3001 ⋅18661.

It can be written as a sum of positive squares in 2 ways, for example, as 6548481 + 10061584 = 2559^2 + 3172^2 .

It is a cyclic number.

It is not a de Polignac number, because 16610065 - 2⁷ = 16609937 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1661002 + ... + 1661011.

It is an arithmetic number, because the mean of its divisors is an integer number (4983021).

Almost surely, 2^16610065 is an apocalyptic number.

It is an amenable number.

16610065 is a deficient number, since it is larger than the sum of its proper divisors (3322019).

16610065 is an equidigital number, since it uses as much as digits as its factorization.

16610065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3322018.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 16610065 is about 4075.5447488649. The cubic root of 16610065 is about 255.1469868968.

The spelling of 16610065 in words is "sixteen million, six hundred ten thousand, sixty-five".