7051661711657 has 2 divisors, whose sum is σ = 7051661711658. Its totient is φ = 7051661711656.

The previous prime is 7051661711651. The next prime is 7051661711707. The reversal of 7051661711657 is 7561171661507.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4328184824041 + 2723476887616 = 2080429^2 + 1650296^2 .

It is a cyclic number.

It is not a de Polignac number, because 7051661711657 - 2²⁴ = 7051644934441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7051661711599 and 7051661711608.

It is not a weakly prime, because it can be changed into another prime (7051661711651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3525830855828 + 3525830855829.

It is an arithmetic number, because the mean of its divisors is an integer number (3525830855829).

Almost surely, 2^{7051661711657} is an apocalyptic number.

It is an amenable number.

7051661711657 is a deficient number, since it is larger than the sum of its proper divisors (1).

7051661711657 is an equidigital number, since it uses as much as digits as its factorization.

7051661711657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1852200, while the sum is 53.

The spelling of 7051661711657 in words is "seven trillion, fifty-one billion, six hundred sixty-one million, seven hundred eleven thousand, six hundred fifty-seven".