16626544562661 has 8 divisors (see below), whose sum is σ = 24184064818464. Its totient is φ = 10076693674320.

The previous prime is 16626544562623. The next prime is 16626544562701.

16626544562661 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 16626544562661 - 2⁶ = 16626544562597 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 16626544562595 and 16626544562604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16626544562561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251917341826 + ... + 251917341891.

It is an arithmetic number, because the mean of its divisors is an integer number (3023008102308).

Almost surely, 2^{16626544562661} is an apocalyptic number.

16626544562661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16626544562661 is a deficient number, since it is larger than the sum of its proper divisors (7557520255803).

16626544562661 is a wasteful number, since it uses less digits than its factorization.

16626544562661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503834683731.

The product of its digits is 74649600, while the sum is 60.

The spelling of 16626544562661 in words is "sixteen trillion, six hundred twenty-six billion, five hundred forty-four million, five hundred sixty-two thousand, six hundred sixty-one".