16681072 has 20 divisors (see below), whose sum is σ = 33725520. Its totient is φ = 7977728.

The previous prime is 16681051. The next prime is 16681073. The reversal of 16681072 is 27018661.

16681072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×16681072³ (a number of 23 digits) contains 333 as substring.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16681073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22297 + ... + 23032.

It is an arithmetic number, because the mean of its divisors is an integer number (1686276).

Almost surely, 2^16681072 is an apocalyptic number.

It is an amenable number.

16681072 is an abundant number, since it is smaller than the sum of its proper divisors (17044448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16681072 is a wasteful number, since it uses less digits than its factorization.

16681072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45360 (or 45354 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 16681072 is about 4084.2468093885. The cubic root of 16681072 is about 255.5100492241.

The spelling of 16681072 in words is "sixteen million, six hundred eighty-one thousand, seventy-two".