66700033370417 has 2 divisors, whose sum is σ = 66700033370418. Its totient is φ = 66700033370416.

The previous prime is 66700033370221. The next prime is 66700033370423. The reversal of 66700033370417 is 71407333000766.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46896322951921 + 19803710418496 = 6848089^2 + 4450136^2 .

It is a cyclic number.

It is not a de Polignac number, because 66700033370417 - 2¹⁶ = 66700033304881 is a prime.

It is a super-2 number, since 2×66700033370417² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66700033370497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33350016685208 + 33350016685209.

It is an arithmetic number, because the mean of its divisors is an integer number (33350016685209).

Almost surely, 2^{66700033370417} is an apocalyptic number.

It is an amenable number.

66700033370417 is a deficient number, since it is larger than the sum of its proper divisors (1).

66700033370417 is an equidigital number, since it uses as much as digits as its factorization.

66700033370417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1333584, while the sum is 47.

The spelling of 66700033370417 in words is "sixty-six trillion, seven hundred billion, thirty-three million, three hundred seventy thousand, four hundred seventeen".