66840197003 has 2 divisors, whose sum is σ = 66840197004. Its totient is φ = 66840197002.

The previous prime is 66840196979. The next prime is 66840197051. The reversal of 66840197003 is 30079104866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66840197003 - 2⁶ = 66840196939 is a prime.

It is a super-2 number, since 2×66840197003² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (66840197063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33420098501 + 33420098502.

It is an arithmetic number, because the mean of its divisors is an integer number (33420098502).

Almost surely, 2^66840197003 is an apocalyptic number.

66840197003 is a deficient number, since it is larger than the sum of its proper divisors (1).

66840197003 is an equidigital number, since it uses as much as digits as its factorization.

66840197003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 66840197003 in words is "sixty-six billion, eight hundred forty million, one hundred ninety-seven thousand, three".