166455653760 has 576 divisors, whose sum is σ = 635058103680. Its totient is φ = 40144896000.

The previous prime is 166455653743. The next prime is 166455653821. The reversal of 166455653760 is 67356554661.

166455653760 is a `hidden beast` number, since 1 + 6 + 6 + 4 + 5 + 565 + 3 + 76 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a junction number, because it is equal to n+sod(n) for n = 166455653697 and 166455653706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 167966865 + ... + 167967855.

It is an arithmetic number, because the mean of its divisors is an integer number (1102531430).

Almost surely, 2^166455653760 is an apocalyptic number.

166455653760 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 166455653760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317529051840).

166455653760 is an abundant number, since it is smaller than the sum of its proper divisors (468602449920).

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

166455653760 is a wasteful number, since it uses less digits than its factorization.

166455653760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279 (or 1253 counting only the distinct ones).

The product of its (nonzero) digits is 13608000, while the sum is 54.

Subtracting from 166455653760 its reverse (67356554661), we obtain a palindrome (99099099099).

The spelling of 166455653760 in words is "one hundred sixty-six billion, four hundred fifty-five million, six hundred fifty-three thousand, seven hundred sixty".