166436042 has 4 divisors (see below), whose sum is σ = 249654066. Its totient is φ = 83218020.

The previous prime is 166436033. The next prime is 166436047. The reversal of 166436042 is 240634661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 127260961 + 39175081 = 11281^2 + 6259^2 .

It is not an unprimeable number, because it can be changed into a prime (166436047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41609009 + ... + 41609012.

Almost surely, 2^166436042 is an apocalyptic number.

166436042 is a deficient number, since it is larger than the sum of its proper divisors (83218024).

166436042 is an equidigital number, since it uses as much as digits as its factorization.

166436042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83218023.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 166436042 is about 12901.0093403578. The cubic root of 166436042 is about 550.0672556873.

The spelling of 166436042 in words is "one hundred sixty-six million, four hundred thirty-six thousand, forty-two".