16680554 has 16 divisors (see below), whose sum is σ = 27569376. Its totient is φ = 7506000.

The previous prime is 16680533. The next prime is 16680569. The reversal of 16680554 is 45508661.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1532 + ... + 5975.

It is an arithmetic number, because the mean of its divisors is an integer number (1723086).

Almost surely, 2^16680554 is an apocalyptic number.

16680554 is a deficient number, since it is larger than the sum of its proper divisors (10888822).

16680554 is a wasteful number, since it uses less digits than its factorization.

16680554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7621.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 16680554 is about 4084.1833945111. The cubic root of 16680554 is about 255.5074043986.

The spelling of 16680554 in words is "sixteen million, six hundred eighty thousand, five hundred fifty-four".