66374402417 has 2 divisors, whose sum is σ = 66374402418. Its totient is φ = 66374402416.

The previous prime is 66374402407. The next prime is 66374402431. The reversal of 66374402417 is 71420447366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55773434896 + 10600967521 = 236164^2 + 102961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66374402417 is a prime.

It is a super-2 number, since 2×66374402417² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66374402407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33187201208 + 33187201209.

It is an arithmetic number, because the mean of its divisors is an integer number (33187201209).

Almost surely, 2^66374402417 is an apocalyptic number.

It is an amenable number.

66374402417 is a deficient number, since it is larger than the sum of its proper divisors (1).

66374402417 is an equidigital number, since it uses as much as digits as its factorization.

66374402417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 44.

The spelling of 66374402417 in words is "sixty-six billion, three hundred seventy-four million, four hundred two thousand, four hundred seventeen".