16506655066601 has 8 divisors (see below), whose sum is σ = 18931882986624. Its totient is φ = 14098210731360.

The previous prime is 16506655066571. The next prime is 16506655066631. The reversal of 16506655066601 is 10666055660561.

It is a happy number.

16506655066601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16506655066571) and next prime (16506655066631).

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

It is not a de Polignac number, because 16506655066601 - 2¹⁰ = 16506655065577 is a prime.

It is a super-2 number, since 2×16506655066601² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16506655066631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4195894085 + ... + 4195898018.

It is an arithmetic number, because the mean of its divisors is an integer number (2366485373328).

Almost surely, 2^{16506655066601} is an apocalyptic number.

It is an amenable number.

16506655066601 is a deficient number, since it is larger than the sum of its proper divisors (2425227920023).

16506655066601 is an equidigital number, since it uses as much as digits as its factorization.

16506655066601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8391792391.

The product of its (nonzero) digits is 5832000, while the sum is 53.

The spelling of 16506655066601 in words is "sixteen trillion, five hundred six billion, six hundred fifty-five million, sixty-six thousand, six hundred one".