166642534 has 32 divisors (see below), whose sum is σ = 270729216. Its totient is φ = 76644480.

The previous prime is 166642519. The next prime is 166642571. The reversal of 166642534 is 435246661.

It is a junction number, because it is equal to n+sod(n) for n = 166642493 and 166642502.

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, 434907 + ... + 435289.

It is an arithmetic number, because the mean of its divisors is an integer number (8460288).

Almost surely, 2^166642534 is an apocalyptic number.

166642534 is a deficient number, since it is larger than the sum of its proper divisors (104086682).

166642534 is a wasteful number, since it uses less digits than its factorization.

166642534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660.

The product of its digits is 103680, while the sum is 37.

The square root of 166642534 is about 12909.0097993611. The cubic root of 166642534 is about 550.2946454305.

The spelling of 166642534 in words is "one hundred sixty-six million, six hundred forty-two thousand, five hundred thirty-four".