166066542 has 12 divisors (see below), whose sum is σ = 359810880. Its totient is φ = 55355508.

The previous prime is 166066529. The next prime is 166066553. The reversal of 166066542 is 245660661.

It is a happy number.

166066542 is a `hidden beast` number, since 1 + 6 + 606 + 6 + 5 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 166066497 and 166066506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4612942 + ... + 4612977.

It is an arithmetic number, because the mean of its divisors is an integer number (29984240).

Almost surely, 2^166066542 is an apocalyptic number.

166066542 is an abundant number, since it is smaller than the sum of its proper divisors (193744338).

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

166066542 is a wasteful number, since it uses less digits than its factorization.

166066542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9225927 (or 9225924 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 166066542 is about 12886.6807984058. The cubic root of 166066542 is about 549.6598911043.

The spelling of 166066542 in words is "one hundred sixty-six million, sixty-six thousand, five hundred forty-two".