16617161 has 4 divisors (see below), whose sum is σ = 18127824. Its totient is φ = 15106500.

The previous prime is 16617157. The next prime is 16617163. The reversal of 16617161 is 16171661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16171661 = 11 ⋅1470151.

It is a cyclic number.

It is not a de Polignac number, because 16617161 - 2² = 16617157 is a prime.

It is a super-2 number, since 2×16617161² = 552260079399842, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16617163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 755315 + ... + 755336.

It is an arithmetic number, because the mean of its divisors is an integer number (4531956).

Almost surely, 2^16617161 is an apocalyptic number.

16617161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16617161 is a deficient number, since it is larger than the sum of its proper divisors (1510663).

16617161 is a wasteful number, since it uses less digits than its factorization.

16617161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510662.

The product of its digits is 1512, while the sum is 29.

The square root of 16617161 is about 4076.4152143765. The cubic root of 16617161 is about 255.1833155777.

The spelling of 16617161 in words is "sixteen million, six hundred seventeen thousand, one hundred sixty-one".