66774033743771 has 16 divisors (see below), whose sum is σ = 67123787512320. Its totient is φ = 66425083071840.

The previous prime is 66774033743633. The next prime is 66774033743827. The reversal of 66774033743771 is 17734733047766.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66774033743771 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66774033743698 and 66774033743707.

It is not an unprimeable number, because it can be changed into a prime (66774033743171) 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 in 15 ways as a sum of consecutive naturals, for example, 892150676 + ... + 892225518.

It is an arithmetic number, because the mean of its divisors is an integer number (4195236719520).

Almost surely, 2^{66774033743771} is an apocalyptic number.

66774033743771 is a deficient number, since it is larger than the sum of its proper divisors (349753768549).

66774033743771 is a wasteful number, since it uses less digits than its factorization.

66774033743771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80146.

The product of its (nonzero) digits is 261382464, while the sum is 65.

The spelling of 66774033743771 in words is "sixty-six trillion, seven hundred seventy-four billion, thirty-three million, seven hundred forty-three thousand, seven hundred seventy-one".