18666365760 has 1176 divisors, whose sum is σ = 82033969536. Its totient is φ = 4023613440.

The previous prime is 18666365677. The next prime is 18666365791. The reversal of 18666365760 is 6756366681.

It is a tau number, because it is divible by the number of its divisors (1176).

It is a super-2 number, since 2×18666365760² (a number of 21 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 18666365697 and 18666365706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 262906525 + ... + 262906595.

Almost surely, 2^18666365760 is an apocalyptic number.

18666365760 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 18666365760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41016984768).

18666365760 is an abundant number, since it is smaller than the sum of its proper divisors (63367603776).

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

18666365760 is an equidigital number, since it uses as much as digits as its factorization.

18666365760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 18666365760 in words is "eighteen billion, six hundred sixty-six million, three hundred sixty-five thousand, seven hundred sixty".