16661433 has 16 divisors (see below), whose sum is σ = 22933760. Its totient is φ = 10751616.

The previous prime is 16661431. The next prime is 16661443. The reversal of 16661433 is 33416661.

It is not a de Polignac number, because 16661433 - 2¹ = 16661431 is a prime.

It is a super-2 number, since 2×16661433² = 555206699226978, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16661433.

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 15 ways as a sum of consecutive naturals, for example, 40533 + ... + 40941.

It is an arithmetic number, because the mean of its divisors is an integer number (1433360).

Almost surely, 2^16661433 is an apocalyptic number.

It is an amenable number.

16661433 is a deficient number, since it is larger than the sum of its proper divisors (6272327).

16661433 is a wasteful number, since it uses less digits than its factorization.

16661433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816.

The product of its digits is 7776, while the sum is 30.

The square root of 16661433 is about 4081.8418636689. The cubic root of 16661433 is about 255.4097372778.

The spelling of 16661433 in words is "sixteen million, six hundred sixty-one thousand, four hundred thirty-three".