166530642 has 32 divisors (see below), whose sum is σ = 338909184. Its totient is φ = 54541200.

The previous prime is 166530641. The next prime is 166530653. The reversal of 166530642 is 246035661.

166530642 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (166530641) 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, 183153 + ... + 184059.

It is an arithmetic number, because the mean of its divisors is an integer number (10590912).

Almost surely, 2^166530642 is an apocalyptic number.

166530642 is an abundant number, since it is smaller than the sum of its proper divisors (172378542).

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

166530642 is a wasteful number, since it uses less digits than its factorization.

166530642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 166530642 is about 12904.6751993221. The cubic root of 166530642 is about 550.1714528831.

The spelling of 166530642 in words is "one hundred sixty-six million, five hundred thirty thousand, six hundred forty-two".