16666668501 has 32 divisors (see below), whose sum is σ = 26753126400. Its totient is φ = 9015935040.

The previous prime is 16666668481. The next prime is 16666668509. The reversal of 16666668501 is 10586666661.

It is not a de Polignac number, because 16666668501 - 2⁹ = 16666667989 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16666668509) 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 31 ways as a sum of consecutive naturals, for example, 555556 + ... + 584786.

It is an arithmetic number, because the mean of its divisors is an integer number (836035200).

Almost surely, 2^16666668501 is an apocalyptic number.

It is an amenable number.

16666668501 is a deficient number, since it is larger than the sum of its proper divisors (10086457899).

16666668501 is a wasteful number, since it uses less digits than its factorization.

16666668501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30689.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 16666668501 in words is "sixteen billion, six hundred sixty-six million, six hundred sixty-eight thousand, five hundred one".