166420743676660 has 96 divisors (see below), whose sum is σ = 382652177040000. Its totient is φ = 60294851366400.

The previous prime is 166420743676631. The next prime is 166420743676667. The reversal of 166420743676660 is 66676347024661.

It is a junction number, because it is equal to n+sod(n) for n = 166420743676592 and 166420743676601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166420743676667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1292533966 + ... + 1292662714.

It is an arithmetic number, because the mean of its divisors is an integer number (3985960177500).

Almost surely, 2^{166420743676660} is an apocalyptic number.

166420743676660 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 166420743676660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191326088520000).

166420743676660 is an abundant number, since it is smaller than the sum of its proper divisors (216231433363340).

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

166420743676660 is a wasteful number, since it uses less digits than its factorization.

166420743676660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150257 (or 150255 counting only the distinct ones).

The product of its (nonzero) digits is 219469824, while the sum is 64.

The spelling of 166420743676660 in words is "one hundred sixty-six trillion, four hundred twenty billion, seven hundred forty-three million, six hundred seventy-six thousand, six hundred sixty".