66734932819 has 2 divisors, whose sum is σ = 66734932820. Its totient is φ = 66734932818.

The previous prime is 66734932799. The next prime is 66734932829. The reversal of 66734932819 is 91823943766.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66734932819 - 2²¹ = 66732835667 is a prime.

It is a super-3 number, since 3×66734932819³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (66734932829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33367466409 + 33367466410.

It is an arithmetic number, because the mean of its divisors is an integer number (33367466410).

Almost surely, 2^66734932819 is an apocalyptic number.

66734932819 is a deficient number, since it is larger than the sum of its proper divisors (1).

66734932819 is an equidigital number, since it uses as much as digits as its factorization.

66734932819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11757312, while the sum is 58.

The spelling of 66734932819 in words is "sixty-six billion, seven hundred thirty-four million, nine hundred thirty-two thousand, eight hundred nineteen".