16671803957 has 8 divisors (see below), whose sum is σ = 16797334296. Its totient is φ = 16546609152.

The previous prime is 16671803923. The next prime is 16671803959. The reversal of 16671803957 is 75930817661.

It can be written as a sum of positive squares in 4 ways, for example, as 13595326801 + 3076477156 = 116599^2 + 55466^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16671803957 - 2⁶ = 16671803893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16671803899 and 16671803908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16671803959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16313 + ... + 183329.

It is an arithmetic number, because the mean of its divisors is an integer number (2099666787).

Almost surely, 2^16671803957 is an apocalyptic number.

It is an amenable number.

16671803957 is a deficient number, since it is larger than the sum of its proper divisors (125530339).

16671803957 is a wasteful number, since it uses less digits than its factorization.

16671803957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167767.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The spelling of 16671803957 in words is "sixteen billion, six hundred seventy-one million, eight hundred three thousand, nine hundred fifty-seven".