16690555 has 16 divisors (see below), whose sum is σ = 23629824. Its totient is φ = 11075040.

The previous prime is 16690537. The next prime is 16690559. The reversal of 16690555 is 55509661.

It is not a de Polignac number, because 16690555 - 2¹⁷ = 16559483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16690559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6607 + ... + 8776.

It is an arithmetic number, because the mean of its divisors is an integer number (1476864).

Almost surely, 2^16690555 is an apocalyptic number.

16690555 is a deficient number, since it is larger than the sum of its proper divisors (6939269).

16690555 is a wasteful number, since it uses less digits than its factorization.

16690555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15426.

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 16690555 is about 4085.4075684073. The cubic root of 16690555 is about 255.5584582391.

The spelling of 16690555 in words is "sixteen million, six hundred ninety thousand, five hundred fifty-five".