16669488496661 has 128 divisors (see below), whose sum is σ = 23255745408000. Its totient is φ = 11870901504000.

The previous prime is 16669488496643. The next prime is 16669488496679.

16669488496661 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (16669488496643) and next prime (16669488496679).

It is not a de Polignac number, because 16669488496661 - 2³⁸ = 16394610589717 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 (16669488496631) 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 127 ways as a sum of consecutive naturals, for example, 599413925 + ... + 599441733.

It is an arithmetic number, because the mean of its divisors is an integer number (181685511000).

Almost surely, 2^{16669488496661} is an apocalyptic number.

16669488496661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16669488496661 is a deficient number, since it is larger than the sum of its proper divisors (6586256911339).

16669488496661 is a wasteful number, since it uses less digits than its factorization.

16669488496661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27977 (or 27941 counting only the distinct ones).

The product of its digits is 3869835264, while the sum is 80.

The spelling of 16669488496661 in words is "sixteen trillion, six hundred sixty-nine billion, four hundred eighty-eight million, four hundred ninety-six thousand, six hundred sixty-one".