16632261 has 6 divisors (see below), whose sum is σ = 24024390. Its totient is φ = 11088168.

The previous prime is 16632257. The next prime is 16632311. The reversal of 16632261 is 16223661.

16632261 is a `hidden beast` number, since 1 + 6 + 632 + 26 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13003236 + 3629025 = 3606^2 + 1905^2 .

It is not a de Polignac number, because 16632261 - 2² = 16632257 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16632241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 924006 + ... + 924023.

It is an arithmetic number, because the mean of its divisors is an integer number (4004065).

Almost surely, 2^16632261 is an apocalyptic number.

It is an amenable number.

16632261 is a deficient number, since it is larger than the sum of its proper divisors (7392129).

16632261 is a wasteful number, since it uses less digits than its factorization.

16632261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848035 (or 1848032 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 16632261 is about 4078.2669113240. The cubic root of 16632261 is about 255.2605871305.

The spelling of 16632261 in words is "sixteen million, six hundred thirty-two thousand, two hundred sixty-one".