16675757281 has 4 divisors (see below), whose sum is σ = 16699278100. Its totient is φ = 16652236464.

The previous prime is 16675757279. The next prime is 16675757323. The reversal of 16675757281 is 18275757661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18275757661 = 7 ⋅2610822523.

It can be written as a sum of positive squares in 2 ways, for example, as 10140490000 + 6535267281 = 100700^2 + 80841^2 .

It is a cyclic number.

It is not a de Polignac number, because 16675757281 - 2¹ = 16675757279 is a prime.

It is a super-2 number, since 2×16675757281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16675757261) 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, 11759346 + ... + 11760763.

It is an arithmetic number, because the mean of its divisors is an integer number (4174819525).

Almost surely, 2^16675757281 is an apocalyptic number.

It is an amenable number.

16675757281 is a deficient number, since it is larger than the sum of its proper divisors (23520819).

16675757281 is an equidigital number, since it uses as much as digits as its factorization.

16675757281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23520818.

The product of its digits is 4939200, while the sum is 55.

The spelling of 16675757281 in words is "sixteen billion, six hundred seventy-five million, seven hundred fifty-seven thousand, two hundred eighty-one".