2681072661 has 8 divisors (see below), whose sum is σ = 3657897760. Its totient is φ = 1745814672.

The previous prime is 2681072659. The next prime is 2681072663. The reversal of 2681072661 is 1662701862.

It is an interprime number because it is at equal distance from previous prime (2681072659) and next prime (2681072663).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2681072661 - 2¹ = 2681072659 is a prime.

It is a super-2 number, since 2×2681072661² = 14376301227123241842, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2681072663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10391626 + ... + 10391883.

It is an arithmetic number, because the mean of its divisors is an integer number (457237220).

Almost surely, 2^2681072661 is an apocalyptic number.

It is an amenable number.

2681072661 is a deficient number, since it is larger than the sum of its proper divisors (976825099).

2681072661 is a wasteful number, since it uses less digits than its factorization.

2681072661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20783555.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 2681072661 is about 51779.0755131839. The cubic root of 2681072661 is about 1389.2152050735.

The spelling of 2681072661 in words is "two billion, six hundred eighty-one million, seventy-two thousand, six hundred sixty-one".