16661436 has 24 divisors (see below), whose sum is σ = 42411264. Its totient is φ = 5048880.

The previous prime is 16661431. The next prime is 16661443. The reversal of 16661436 is 63416661.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 16661397 and 16661406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16661431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62980 + ... + 63243.

It is an arithmetic number, because the mean of its divisors is an integer number (1767136).

Almost surely, 2^16661436 is an apocalyptic number.

It is an amenable number.

16661436 is an abundant number, since it is smaller than the sum of its proper divisors (25749828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16661436 is a wasteful number, since it uses less digits than its factorization.

16661436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126241 (or 126239 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 16661436 is about 4081.8422311500. The cubic root of 16661436 is about 255.4097526072.

The spelling of 16661436 in words is "sixteen million, six hundred sixty-one thousand, four hundred thirty-six".