16226661 has 16 divisors (see below), whose sum is σ = 24629760. Its totient is φ = 9406320.

The previous prime is 16226621. The next prime is 16226677. The reversal of 16226661 is 16662261.

It is not a de Polignac number, because 16226661 - 2⁶ = 16226597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16226621) 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, 9931 + ... + 11448.

It is an arithmetic number, because the mean of its divisors is an integer number (1539360).

Almost surely, 2^16226661 is an apocalyptic number.

16226661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16226661 is a deficient number, since it is larger than the sum of its proper divisors (8403099).

16226661 is a wasteful number, since it uses less digits than its factorization.

16226661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21416.

The product of its digits is 5184, while the sum is 30.

The square root of 16226661 is about 4028.2329873035. The cubic root of 16226661 is about 253.1685306631.

Subtracting 16226661 from its reverse (16662261), we obtain a square (435600 = 660²).

The spelling of 16226661 in words is "sixteen million, two hundred twenty-six thousand, six hundred sixty-one".