66703777777607 has 2 divisors, whose sum is σ = 66703777777608. Its totient is φ = 66703777777606.

The previous prime is 66703777777603. The next prime is 66703777777621. The reversal of 66703777777607 is 70677777730766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66703777777607 - 2² = 66703777777603 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66703777777603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33351888888803 + 33351888888804.

It is an arithmetic number, because the mean of its divisors is an integer number (33351888888804).

Almost surely, 2^{66703777777607} is an apocalyptic number.

66703777777607 is a deficient number, since it is larger than the sum of its proper divisors (1).

66703777777607 is an equidigital number, since it uses as much as digits as its factorization.

66703777777607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3735591048, while the sum is 77.

The spelling of 66703777777607 in words is "sixty-six trillion, seven hundred three billion, seven hundred seventy-seven million, seven hundred seventy-seven thousand, six hundred seven".