16668350213 has 8 divisors (see below), whose sum is σ = 18257422680. Its totient is φ = 15146897920.

The previous prime is 16668350177. The next prime is 16668350221. The reversal of 16668350213 is 31205386661.

It can be written as a sum of positive squares in 4 ways, for example, as 604815649 + 16063534564 = 24593^2 + 126742^2 .

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 16668350213 - 2¹⁸ = 16668088069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16668350243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16904528 + ... + 16905513.

It is an arithmetic number, because the mean of its divisors is an integer number (2282177835).

Almost surely, 2^16668350213 is an apocalyptic number.

It is an amenable number.

16668350213 is a deficient number, since it is larger than the sum of its proper divisors (1589072467).

16668350213 is a wasteful number, since it uses less digits than its factorization.

16668350213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33810087.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 16668350213 in words is "sixteen billion, six hundred sixty-eight million, three hundred fifty thousand, two hundred thirteen".