7666107881 has 8 divisors (see below), whose sum is σ = 7858221000. Its totient is φ = 7474239360.

The previous prime is 7666107877. The next prime is 7666107887. The reversal of 7666107881 is 1887016667.

It can be written as a sum of positive squares in 4 ways, for example, as 62267881 + 7603840000 = 7891^2 + 87200^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7666107881 - 2² = 7666107877 is a prime.

It is a super-2 number, since 2×7666107881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7666107887) 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, 3155 + ... + 123863.

It is an arithmetic number, because the mean of its divisors is an integer number (982277625).

Almost surely, 2^7666107881 is an apocalyptic number.

It is an amenable number.

7666107881 is a deficient number, since it is larger than the sum of its proper divisors (192113119).

7666107881 is a wasteful number, since it uses less digits than its factorization.

7666107881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122299.

The product of its (nonzero) digits is 677376, while the sum is 50.

The square root of 7666107881 is about 87556.3126279311. The cubic root of 7666107881 is about 1971.7793264699.

The spelling of 7666107881 in words is "seven billion, six hundred sixty-six million, one hundred seven thousand, eight hundred eighty-one".