166626242 has 4 divisors (see below), whose sum is σ = 249939366. Its totient is φ = 83313120.

The previous prime is 166626227. The next prime is 166626287. The reversal of 166626242 is 242626661.

166626242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242626661 = 4649 ⋅52189.

It can be written as a sum of positive squares in only one way, i.e., 131354521 + 35271721 = 11461^2 + 5939^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41656559 + ... + 41656562.

Almost surely, 2^166626242 is an apocalyptic number.

166626242 is a deficient number, since it is larger than the sum of its proper divisors (83313124).

166626242 is an equidigital number, since it uses as much as digits as its factorization.

166626242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83313123.

The product of its digits is 41472, while the sum is 35.

The square root of 166626242 is about 12908.3787518030. The cubic root of 166626242 is about 550.2767114486.

The spelling of 166626242 in words is "one hundred sixty-six million, six hundred twenty-six thousand, two hundred forty-two".