166100665120542 has 32 divisors (see below), whose sum is σ = 377696602863360. Its totient is φ = 54079286317560.

The previous prime is 166100665120541. The next prime is 166100665120547. The reversal of 166100665120542 is 245021566001661.

166100665120542 is a `hidden beast` number, since 1 + 6 + 610 + 0 + 6 + 6 + 5 + 1 + 20 + 5 + 4 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166100665120541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35766721434 + ... + 35766726077.

It is an arithmetic number, because the mean of its divisors is an integer number (11803018839480).

Almost surely, 2^{166100665120542} is an apocalyptic number.

166100665120542 is an abundant number, since it is smaller than the sum of its proper divisors (211595937742818).

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

166100665120542 is a wasteful number, since it uses less digits than its factorization.

166100665120542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71533447565 (or 71533447559 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 166100665120542 in words is "one hundred sixty-six trillion, one hundred billion, six hundred sixty-five million, one hundred twenty thousand, five hundred forty-two".