66774033743698 has 16 divisors (see below), whose sum is σ = 100825237665216. Its totient is φ = 33165624999600.

The previous prime is 66774033743633. The next prime is 66774033743827. The reversal of 66774033743698 is 89634733047766.

It is a self number, because there is not a number n which added to its sum of digits gives 66774033743698.

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, 36597565 + ... + 38378767.

It is an arithmetic number, because the mean of its divisors is an integer number (6301577354076).

Almost surely, 2^{66774033743698} is an apocalyptic number.

66774033743698 is a deficient number, since it is larger than the sum of its proper divisors (34051203921518).

66774033743698 is a wasteful number, since it uses less digits than its factorization.

66774033743698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1905489.

The product of its (nonzero) digits is 2304433152, while the sum is 73.

The spelling of 66774033743698 in words is "sixty-six trillion, seven hundred seventy-four billion, thirty-three million, seven hundred forty-three thousand, six hundred ninety-eight".