16670503553881 has 4 divisors (see below), whose sum is σ = 16670636515252. Its totient is φ = 16670370592512.

The previous prime is 16670503553839. The next prime is 16670503553909. The reversal of 16670503553881 is 18835530507661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11094954766281 + 5575548787600 = 3330909^2 + 2361260^2 .

It is a cyclic number.

It is not a de Polignac number, because 16670503553881 - 2¹⁷ = 16670503422809 is a prime.

It is a super-2 number, since 2×16670503553881² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16670503553801) 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, 66292440 + ... + 66543433.

It is an arithmetic number, because the mean of its divisors is an integer number (4167659128813).

Almost surely, 2^{16670503553881} is an apocalyptic number.

It is an amenable number.

16670503553881 is a deficient number, since it is larger than the sum of its proper divisors (132961371).

16670503553881 is a wasteful number, since it uses less digits than its factorization.

16670503553881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132961370.

The product of its (nonzero) digits is 18144000, while the sum is 58.

The spelling of 16670503553881 in words is "sixteen trillion, six hundred seventy billion, five hundred three million, five hundred fifty-three thousand, eight hundred eighty-one".