6375885881665 has 16 divisors (see below), whose sum is σ = 7857933634512. Its totient is φ = 4962797973504.

The previous prime is 6375885881663. The next prime is 6375885881711. The reversal of 6375885881665 is 5661885885736.

It can be written as a sum of positive squares in 8 ways, for example, as 65736857664 + 6310149024001 = 256392^2 + 2512001^2 .

It is a cyclic number.

It is not a de Polignac number, because 6375885881665 - 2¹ = 6375885881663 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6375885881591 and 6375885881600.

It is not an unprimeable number, because it can be changed into a prime (6375885881663) 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, 30936037 + ... + 31141453.

It is an arithmetic number, because the mean of its divisors is an integer number (491120852157).

Almost surely, 2^{6375885881665} is an apocalyptic number.

It is an amenable number.

6375885881665 is a deficient number, since it is larger than the sum of its proper divisors (1482047752847).

6375885881665 is a wasteful number, since it uses less digits than its factorization.

6375885881665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373236.

The product of its digits is 2322432000, while the sum is 76.

The spelling of 6375885881665 in words is "six trillion, three hundred seventy-five billion, eight hundred eighty-five million, eight hundred eighty-one thousand, six hundred sixty-five".