66774033743770 has 16 divisors (see below), whose sum is σ = 121987190004768. Its totient is φ = 26310962549520.

The previous prime is 66774033743633. The next prime is 66774033743827. The reversal of 66774033743770 is 7734733047766.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49831367796 + ... + 49831369135.

It is an arithmetic number, because the mean of its divisors is an integer number (7624199375298).

Almost surely, 2^{66774033743770} is an apocalyptic number.

66774033743770 is a deficient number, since it is larger than the sum of its proper divisors (55213156260998).

66774033743770 is a wasteful number, since it uses less digits than its factorization.

66774033743770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99662737005.

The product of its (nonzero) digits is 261382464, while the sum is 64.

The spelling of 66774033743770 in words is "sixty-six trillion, seven hundred seventy-four billion, thirty-three million, seven hundred forty-three thousand, seven hundred seventy".