16665181102 has 4 divisors (see below), whose sum is σ = 24997771656. Its totient is φ = 8332590550.

The previous prime is 16665181081. The next prime is 16665181109. The reversal of 16665181102 is 20118156661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20118156661 = 12043 ⋅1670527.

It is a super-2 number, since 2×16665181102² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16665181109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4166295274 + ... + 4166295277.

It is an arithmetic number, because the mean of its divisors is an integer number (6249442914).

Almost surely, 2^16665181102 is an apocalyptic number.

16665181102 is a deficient number, since it is larger than the sum of its proper divisors (8332590554).

16665181102 is an equidigital number, since it uses as much as digits as its factorization.

16665181102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8332590553.

The product of its (nonzero) digits is 17280, while the sum is 37.

The spelling of 16665181102 in words is "sixteen billion, six hundred sixty-five million, one hundred eighty-one thousand, one hundred two".