16727427661 has 16 divisors (see below), whose sum is σ = 20249481600. Its totient is φ = 13489136640.

The previous prime is 16727427641. The next prime is 16727427667. The reversal of 16727427661 is 16672472761.

It is a de Polignac number, because none of the positive numbers 2^k-16727427661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16727427667) 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, 295141 + ... + 347221.

It is an arithmetic number, because the mean of its divisors is an integer number (1265592600).

Almost surely, 2^16727427661 is an apocalyptic number.

It is an amenable number.

16727427661 is a deficient number, since it is larger than the sum of its proper divisors (3522053939).

16727427661 is a wasteful number, since it uses less digits than its factorization.

16727427661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54804.

The product of its digits is 1185408, while the sum is 49.

The spelling of 16727427661 in words is "sixteen billion, seven hundred twenty-seven million, four hundred twenty-seven thousand, six hundred sixty-one".