16661176420115 has 4 divisors (see below), whose sum is σ = 19993411704144. Its totient is φ = 13328941136088.

The previous prime is 16661176420103. The next prime is 16661176420117. The reversal of 16661176420115 is 51102467116661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16661176420115 - 2⁶ = 16661176420051 is a prime.

It is a super-2 number, since 2×16661176420115² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16661176420115.

It is not an unprimeable number, because it can be changed into a prime (16661176420117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1666117642007 + ... + 1666117642016.

It is an arithmetic number, because the mean of its divisors is an integer number (4998352926036).

Almost surely, 2^{16661176420115} is an apocalyptic number.

16661176420115 is a deficient number, since it is larger than the sum of its proper divisors (3332235284029).

16661176420115 is an equidigital number, since it uses as much as digits as its factorization.

16661176420115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3332235284028.

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 16661176420115 in words is "sixteen trillion, six hundred sixty-one billion, one hundred seventy-six million, four hundred twenty thousand, one hundred fifteen".