1666692747104 has 288 divisors, whose sum is σ = 4389040857600. Its totient is φ = 621116348160.

The previous prime is 1666692747103. The next prime is 1666692747113. The reversal of 1666692747104 is 4017472966661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666692747103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30518927 + ... + 30573489.

It is an arithmetic number, because the mean of its divisors is an integer number (15239725200).

Almost surely, 2^{1666692747104} is an apocalyptic number.

1666692747104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666692747104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2194520428800).

1666692747104 is an abundant number, since it is smaller than the sum of its proper divisors (2722348110496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666692747104 is a wasteful number, since it uses less digits than its factorization.

1666692747104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54639 (or 54606 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 59.

The spelling of 1666692747104 in words is "one trillion, six hundred sixty-six billion, six hundred ninety-two million, seven hundred forty-seven thousand, one hundred four".