2116661716 has 12 divisors (see below), whose sum is σ = 3989093332. Its totient is φ = 976920768.

The previous prime is 2116661711. The next prime is 2116661737. The reversal of 2116661716 is 6171666112.

It can be written as a sum of positive squares in 2 ways, for example, as 190329616 + 1926332100 = 13796^2 + 43890^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116661711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20352465 + ... + 20352568.

Almost surely, 2^2116661716 is an apocalyptic number.

2116661716 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2116661716 is a deficient number, since it is larger than the sum of its proper divisors (1872431616).

2116661716 is a wasteful number, since it uses less digits than its factorization.

2116661716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40705050 (or 40705048 counting only the distinct ones).

The product of its digits is 18144, while the sum is 37.

The square root of 2116661716 is about 46007.1920029901. The cubic root of 2116661716 is about 1283.9570164795.

The spelling of 2116661716 in words is "two billion, one hundred sixteen million, six hundred sixty-one thousand, seven hundred sixteen".