1665560350080 has 1536 divisors, whose sum is σ = 6978468556800. Its totient is φ = 361267200000.

The previous prime is 1665560350057. The next prime is 1665560350081. The reversal of 1665560350080 is 800530655661.

1665560350080 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 5 + 60 + 3 + 500 + 80 = 666.

It is a super-2 number, since 2×1665560350080² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665560350081) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2217789705 + ... + 2217790455.

It is an arithmetic number, because the mean of its divisors is an integer number (4543273800).

Almost surely, 2^{1665560350080} is an apocalyptic number.

1665560350080 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 1665560350080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3489234278400).

1665560350080 is an abundant number, since it is smaller than the sum of its proper divisors (5312908206720).

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

1665560350080 is a wasteful number, since it uses less digits than its factorization.

1665560350080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904 (or 889 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 1665560350080 in words is "one trillion, six hundred sixty-five billion, five hundred sixty million, three hundred fifty thousand, eighty".