16666651650039 has 8 divisors (see below), whose sum is σ = 22222222186752. Its totient is φ = 11111091106680.

The previous prime is 16666651650023. The next prime is 16666651650097. The reversal of 16666651650039 is 93005615666661.

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

It is not a de Polignac number, because 16666651650039 - 2⁴ = 16666651650023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16666651650139) 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, 3346674 + ... + 6673344.

It is an arithmetic number, because the mean of its divisors is an integer number (2777777773344).

Almost surely, 2^{16666651650039} is an apocalyptic number.

16666651650039 is a deficient number, since it is larger than the sum of its proper divisors (5555570536713).

16666651650039 is a wasteful number, since it uses less digits than its factorization.

16666651650039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4996677.

The product of its (nonzero) digits is 31492800, while the sum is 60.

The spelling of 16666651650039 in words is "sixteen trillion, six hundred sixty-six billion, six hundred fifty-one million, six hundred fifty thousand, thirty-nine".