16566556101 has 16 divisors (see below), whose sum is σ = 22144376640. Its totient is φ = 11016587520.

The previous prime is 16566556093. The next prime is 16566556109. The reversal of 16566556101 is 10165566561.

It is an interprime number because it is at equal distance from previous prime (16566556093) and next prime (16566556109).

It is not a de Polignac number, because 16566556101 - 2³ = 16566556093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16566556109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2499570 + ... + 2506188.

It is an arithmetic number, because the mean of its divisors is an integer number (1384023540).

Almost surely, 2^16566556101 is an apocalyptic number.

It is an amenable number.

16566556101 is a deficient number, since it is larger than the sum of its proper divisors (5577820539).

16566556101 is a wasteful number, since it uses less digits than its factorization.

16566556101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8596.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 16566556101 in words is "sixteen billion, five hundred sixty-six million, five hundred fifty-six thousand, one hundred one".