16660620507111 has 64 divisors (see below), whose sum is σ = 26661629288448. Its totient is φ = 9048104638848.

The previous prime is 16660620507101. The next prime is 16660620507133. The reversal of 16660620507111 is 11170502606661.

It is a happy number.

It is not a de Polignac number, because 16660620507111 - 2⁹ = 16660620506599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16660620507101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 46827856 + ... + 47182298.

It is an arithmetic number, because the mean of its divisors is an integer number (416587957632).

Almost surely, 2^{16660620507111} is an apocalyptic number.

16660620507111 is a deficient number, since it is larger than the sum of its proper divisors (10001008781337).

16660620507111 is a wasteful number, since it uses less digits than its factorization.

16660620507111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355100.

The product of its (nonzero) digits is 90720, while the sum is 42.

The spelling of 16660620507111 in words is "sixteen trillion, six hundred sixty billion, six hundred twenty million, five hundred seven thousand, one hundred eleven".