166222442 has 8 divisors (see below), whose sum is σ = 249574500. Its totient is φ = 83030944.

The previous prime is 166222439. The next prime is 166222451. The reversal of 166222442 is 244222661.

166222442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 134536801 + 31685641 = 11599^2 + 5629^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37517 + ... + 41712.

Almost surely, 2^166222442 is an apocalyptic number.

166222442 is a deficient number, since it is larger than the sum of its proper divisors (83352058).

166222442 is a wasteful number, since it uses less digits than its factorization.

166222442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80280.

The product of its digits is 9216, while the sum is 29.

The square root of 166222442 is about 12892.7282605351. The cubic root of 166222442 is about 549.8318406025.

The spelling of 166222442 in words is "one hundred sixty-six million, two hundred twenty-two thousand, four hundred forty-two".