16616069 has 4 divisors (see below), whose sum is σ = 16768620. Its totient is φ = 16463520.

The previous prime is 16616053. The next prime is 16616081. The reversal of 16616069 is 96061661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96061661 = 277 ⋅346793.

It can be written as a sum of positive squares in 2 ways, for example, as 5313025 + 11303044 = 2305^2 + 3362^2 .

It is a cyclic number.

It is not a de Polignac number, because 16616069 - 2⁴ = 16616053 is a prime.

It is a super-2 number, since 2×16616069² = 552187498025522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16616009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76112 + ... + 76329.

It is an arithmetic number, because the mean of its divisors is an integer number (4192155).

Almost surely, 2^16616069 is an apocalyptic number.

It is an amenable number.

16616069 is a deficient number, since it is larger than the sum of its proper divisors (152551).

16616069 is a wasteful number, since it uses less digits than its factorization.

16616069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152550.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 16616069 is about 4076.2812709625. The cubic root of 16616069 is about 255.1777256480.

The spelling of 16616069 in words is "sixteen million, six hundred sixteen thousand, sixty-nine".