2684166927681 has 16 divisors (see below), whose sum is σ = 3666314852928. Its totient is φ = 1745735040000.

The previous prime is 2684166927671. The next prime is 2684166927683. The reversal of 2684166927681 is 1867296614862.

It is not a de Polignac number, because 2684166927681 - 2³⁷ = 2546727974209 is a prime.

It is a super-2 number, since 2×2684166927681² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2684166927683) 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, 3054450 + ... + 3833796.

It is an arithmetic number, because the mean of its divisors is an integer number (229144678308).

Almost surely, 2^{2684166927681} is an apocalyptic number.

It is an amenable number.

2684166927681 is a deficient number, since it is larger than the sum of its proper divisors (982147925247).

2684166927681 is a wasteful number, since it uses less digits than its factorization.

2684166927681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807392.

The product of its digits is 83607552, while the sum is 66.

The spelling of 2684166927681 in words is "two trillion, six hundred eighty-four billion, one hundred sixty-six million, nine hundred twenty-seven thousand, six hundred eighty-one".