79747066417 has 2 divisors, whose sum is σ = 79747066418. Its totient is φ = 79747066416.

The previous prime is 79747066409. The next prime is 79747066459. The reversal of 79747066417 is 71466074797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50245912336 + 29501154081 = 224156^2 + 171759^2 .

It is a cyclic number.

It is not a de Polignac number, because 79747066417 - 2³ = 79747066409 is a prime.

It is not a weakly prime, because it can be changed into another prime (79747066117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39873533208 + 39873533209.

It is an arithmetic number, because the mean of its divisors is an integer number (39873533209).

Almost surely, 2^79747066417 is an apocalyptic number.

It is an amenable number.

79747066417 is a deficient number, since it is larger than the sum of its proper divisors (1).

79747066417 is an equidigital number, since it uses as much as digits as its factorization.

79747066417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12446784, while the sum is 58.

The spelling of 79747066417 in words is "seventy-nine billion, seven hundred forty-seven million, sixty-six thousand, four hundred seventeen".