66057115099993 has 2 divisors, whose sum is σ = 66057115099994. Its totient is φ = 66057115099992.

The previous prime is 66057115099973. The next prime is 66057115100023. The reversal of 66057115099993 is 39999051175066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62688579782544 + 3368535317449 = 7917612^2 + 1835357^2 .

It is a cyclic number.

It is not a de Polignac number, because 66057115099993 - 2¹³ = 66057115091801 is a prime.

It is not a weakly prime, because it can be changed into another prime (66057115099973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33028557549996 + 33028557549997.

It is an arithmetic number, because the mean of its divisors is an integer number (33028557549997).

Almost surely, 2^{66057115099993} is an apocalyptic number.

It is an amenable number.

66057115099993 is a deficient number, since it is larger than the sum of its proper divisors (1).

66057115099993 is an equidigital number, since it uses as much as digits as its factorization.

66057115099993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124002900, while the sum is 70.

The spelling of 66057115099993 in words is "sixty-six trillion, fifty-seven billion, one hundred fifteen million, ninety-nine thousand, nine hundred ninety-three".