16681701 has 4 divisors (see below), whose sum is σ = 22242272. Its totient is φ = 11121132.

The previous prime is 16681681. The next prime is 16681703. The reversal of 16681701 is 10718661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16681701 - 2¹¹ = 16679653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16681703) 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, 2780281 + ... + 2780286.

It is an arithmetic number, because the mean of its divisors is an integer number (5560568).

Almost surely, 2^16681701 is an apocalyptic number.

It is an amenable number.

16681701 is a deficient number, since it is larger than the sum of its proper divisors (5560571).

16681701 is an equidigital number, since it uses as much as digits as its factorization.

16681701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5560570.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 16681701 is about 4084.3238118445. The cubic root of 16681701 is about 255.5132607244.

The spelling of 16681701 in words is "sixteen million, six hundred eighty-one thousand, seven hundred one".