8042786657 has 2 divisors, whose sum is σ = 8042786658. Its totient is φ = 8042786656.

The previous prime is 8042786641. The next prime is 8042786677. The reversal of 8042786657 is 7566872408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4346633041 + 3696153616 = 65929^2 + 60796^2 .

It is a cyclic number.

It is not a de Polignac number, because 8042786657 - 2⁴ = 8042786641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8042786599 and 8042786608.

It is not a weakly prime, because it can be changed into another prime (8042786617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4021393328 + 4021393329.

It is an arithmetic number, because the mean of its divisors is an integer number (4021393329).

Almost surely, 2^8042786657 is an apocalyptic number.

It is an amenable number.

8042786657 is a deficient number, since it is larger than the sum of its proper divisors (1).

8042786657 is an equidigital number, since it uses as much as digits as its factorization.

8042786657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4515840, while the sum is 53.

The square root of 8042786657 is about 89681.5848265406. The cubic root of 8042786657 is about 2003.5592169799.

The spelling of 8042786657 in words is "eight billion, forty-two million, seven hundred eighty-six thousand, six hundred fifty-seven".