166061505560 has 64 divisors (see below), whose sum is σ = 405990835200. Its totient is φ = 60898608000.

The previous prime is 166061505523. The next prime is 166061505613. The reversal of 166061505560 is 65505160661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3500666 + ... + 3547785.

It is an arithmetic number, because the mean of its divisors is an integer number (6343606800).

Almost surely, 2^166061505560 is an apocalyptic number.

166061505560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166061505560 is an abundant number, since it is smaller than the sum of its proper divisors (239929329640).

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

166061505560 is a wasteful number, since it uses less digits than its factorization.

166061505560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7048512 (or 7048508 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 166061505560 in words is "one hundred sixty-six billion, sixty-one million, five hundred five thousand, five hundred sixty".