1666554724080 has 200 divisors, whose sum is σ = 5788915539264. Its totient is φ = 444359001600.

The previous prime is 1666554724069. The next prime is 1666554724103. The reversal of 1666554724080 is 804274556661.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 96096210 + ... + 96113550.

Almost surely, 2^{1666554724080} is an apocalyptic number.

1666554724080 is a gapful number since it is divisible by the number (10) 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 1666554724080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2894457769632).

1666554724080 is an abundant number, since it is smaller than the sum of its proper divisors (4122360815184).

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

1666554724080 is a wasteful number, since it uses less digits than its factorization.

1666554724080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32197 (or 32182 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 54.

The spelling of 1666554724080 in words is "one trillion, six hundred sixty-six billion, five hundred fifty-four million, seven hundred twenty-four thousand, eighty".