16661552 has 20 divisors (see below), whose sum is σ = 32385576. Its totient is φ = 8304000.

The previous prime is 16661531. The next prime is 16661563. The reversal of 16661552 is 25516661.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4052 + ... + 7052.

Almost surely, 2^16661552 is an apocalyptic number.

It is an amenable number.

16661552 is a deficient number, since it is larger than the sum of its proper divisors (15724024).

16661552 is a wasteful number, since it uses less digits than its factorization.

16661552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3356 (or 3350 counting only the distinct ones).

The product of its digits is 10800, while the sum is 32.

The square root of 16661552 is about 4081.8564403957. The cubic root of 16661552 is about 255.4103453425.

The spelling of 16661552 in words is "sixteen million, six hundred sixty-one thousand, five hundred fifty-two".