16661365744774 has 8 divisors (see below), whose sum is σ = 25032818682000. Its totient is φ = 8317092850776.

The previous prime is 16661365744729. The next prime is 16661365744843. The reversal of 16661365744774 is 47744756316661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×16661365744774³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6795009274 + ... + 6795011725.

It is an arithmetic number, because the mean of its divisors is an integer number (3129102335250).

Almost surely, 2^{16661365744774} is an apocalyptic number.

16661365744774 is a deficient number, since it is larger than the sum of its proper divisors (8371452937226).

16661365744774 is a wasteful number, since it uses less digits than its factorization.

16661365744774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13590021614.

The product of its digits is 426746880, while the sum is 67.

The spelling of 16661365744774 in words is "sixteen trillion, six hundred sixty-one billion, three hundred sixty-five million, seven hundred forty-four thousand, seven hundred seventy-four".