16705557 has 12 divisors (see below), whose sum is σ = 26324064. Its totient is φ = 10124520.

The previous prime is 16705553. The next prime is 16705571. The reversal of 16705557 is 75550761.

It is not a de Polignac number, because 16705557 - 2² = 16705553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16705553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84273 + ... + 84470.

It is an arithmetic number, because the mean of its divisors is an integer number (2193672).

Almost surely, 2^16705557 is an apocalyptic number.

It is an amenable number.

16705557 is a deficient number, since it is larger than the sum of its proper divisors (9618507).

16705557 is a wasteful number, since it uses less digits than its factorization.

16705557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168760 (or 168757 counting only the distinct ones).

The product of its (nonzero) digits is 36750, while the sum is 36.

The square root of 16705557 is about 4087.2432029425. The cubic root of 16705557 is about 255.6350033248.

It can be divided in two parts, 1670 and 5557, that added together give a palindrome (7227).

The spelling of 16705557 in words is "sixteen million, seven hundred five thousand, five hundred fifty-seven".