16661453 has 8 divisors (see below), whose sum is σ = 17756928. Its totient is φ = 15596944.

The previous prime is 16661443. The next prime is 16661467. The reversal of 16661453 is 35416661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16661453 - 2²² = 12467149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16661443) 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, 6626 + ... + 8787.

It is an arithmetic number, because the mean of its divisors is an integer number (2219616).

Almost surely, 2^16661453 is an apocalyptic number.

It is an amenable number.

16661453 is a deficient number, since it is larger than the sum of its proper divisors (1095475).

16661453 is a wasteful number, since it uses less digits than its factorization.

16661453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15483.

The product of its digits is 12960, while the sum is 32.

The square root of 16661453 is about 4081.8443135426. The cubic root of 16661453 is about 255.4098394737.

The spelling of 16661453 in words is "sixteen million, six hundred sixty-one thousand, four hundred fifty-three".