7875661061 has 2 divisors, whose sum is σ = 7875661062. Its totient is φ = 7875661060.

The previous prime is 7875661037. The next prime is 7875661093. The reversal of 7875661061 is 1601665787.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7859709025 + 15952036 = 88655^2 + 3994^2 .

It is an emirp because it is prime and its reverse (1601665787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7875661061 - 2²⁶ = 7808552197 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7875660997 and 7875661015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7875660061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3937830530 + 3937830531.

It is an arithmetic number, because the mean of its divisors is an integer number (3937830531).

Almost surely, 2^7875661061 is an apocalyptic number.

It is an amenable number.

7875661061 is a deficient number, since it is larger than the sum of its proper divisors (1).

7875661061 is an equidigital number, since it uses as much as digits as its factorization.

7875661061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 7875661061 is about 88744.9213251102. The cubic root of 7875661061 is about 1989.5842722220.

The spelling of 7875661061 in words is "seven billion, eight hundred seventy-five million, six hundred sixty-one thousand, sixty-one".