16688001 has 16 divisors (see below), whose sum is σ = 24435648. Its totient is φ = 10046400.

The previous prime is 16687997. The next prime is 16688003. The reversal of 16688001 is 10088661.

It is not a de Polignac number, because 16688001 - 2² = 16687997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16688001.

It is not an unprimeable number, because it can be changed into a prime (16688003) 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 15 ways as a sum of consecutive naturals, for example, 3571 + ... + 6791.

It is an arithmetic number, because the mean of its divisors is an integer number (1527228).

Almost surely, 2^16688001 is an apocalyptic number.

16688001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16688001 is a deficient number, since it is larger than the sum of its proper divisors (7747647).

16688001 is a wasteful number, since it uses less digits than its factorization.

16688001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3392.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 16688001 is about 4085.0949805359. The cubic root of 16688001 is about 255.5454223315.

It can be divided in two parts, 1668 and 8001, that added together give a palindrome (9669).

The spelling of 16688001 in words is "sixteen million, six hundred eighty-eight thousand, one".