16557099 has 36 divisors (see below), whose sum is σ = 25618536. Its totient is φ = 9504768.

The previous prime is 16557091. The next prime is 16557103. The reversal of 16557099 is 99075561.

It is not a de Polignac number, because 16557099 - 2³ = 16557091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16557099.

It is not an unprimeable number, because it can be changed into a prime (16557091) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 146467 + ... + 146579.

It is an arithmetic number, because the mean of its divisors is an integer number (711626).

Almost surely, 2^16557099 is an apocalyptic number.

16557099 is a deficient number, since it is larger than the sum of its proper divisors (9061437).

16557099 is a wasteful number, since it uses less digits than its factorization.

16557099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 85050, while the sum is 42.

The square root of 16557099 is about 4069.0415333344. The cubic root of 16557099 is about 254.8754947751.

The spelling of 16557099 in words is "sixteen million, five hundred fifty-seven thousand, ninety-nine".