166501315515552 has 24 divisors (see below), whose sum is σ = 437065953228576. Its totient is φ = 55500438505152.

The previous prime is 166501315515529. The next prime is 166501315515617. The reversal of 166501315515552 is 255515513105661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 166501315515495 and 166501315515504.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 867194351548 + ... + 867194351739.

It is an arithmetic number, because the mean of its divisors is an integer number (18211081384524).

Almost surely, 2^{166501315515552} is an apocalyptic number.

166501315515552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166501315515552 is an abundant number, since it is smaller than the sum of its proper divisors (270564637713024).

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

166501315515552 is a wasteful number, since it uses less digits than its factorization.

166501315515552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734388703300 (or 1734388703292 counting only the distinct ones).

The product of its (nonzero) digits is 3375000, while the sum is 51.

The spelling of 166501315515552 in words is "one hundred sixty-six trillion, five hundred one billion, three hundred fifteen million, five hundred fifteen thousand, five hundred fifty-two".