16668517037 has 4 divisors (see below), whose sum is σ = 16668781536. Its totient is φ = 16668252540.

The previous prime is 16668517027. The next prime is 16668517039. The reversal of 16668517037 is 73071586661.

16668517037 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16668517037 - 2¹⁸ = 16668254893 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 (16668517039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23138 + ... + 184044.

It is an arithmetic number, because the mean of its divisors is an integer number (4167195384).

Almost surely, 2^16668517037 is an apocalyptic number.

It is an amenable number.

16668517037 is a deficient number, since it is larger than the sum of its proper divisors (264499).

16668517037 is a wasteful number, since it uses less digits than its factorization.

16668517037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264498.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 16668517037 in words is "sixteen billion, six hundred sixty-eight million, five hundred seventeen thousand, thirty-seven".