7065801887861 has 2 divisors, whose sum is σ = 7065801887862. Its totient is φ = 7065801887860.

The previous prime is 7065801887827. The next prime is 7065801887899. The reversal of 7065801887861 is 1687881085607.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4965276324100 + 2100525563761 = 2228290^2 + 1449319^2 .

It is a cyclic number.

It is not a de Polignac number, because 7065801887861 - 2¹⁸ = 7065801625717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7065801887161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3532900943930 + 3532900943931.

It is an arithmetic number, because the mean of its divisors is an integer number (3532900943931).

Almost surely, 2^{7065801887861} is an apocalyptic number.

It is an amenable number.

7065801887861 is a deficient number, since it is larger than the sum of its proper divisors (1).

7065801887861 is an equidigital number, since it uses as much as digits as its factorization.

7065801887861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36126720, while the sum is 65.

The spelling of 7065801887861 in words is "seven trillion, sixty-five billion, eight hundred one million, eight hundred eighty-seven thousand, eight hundred sixty-one".