166542622 has 4 divisors (see below), whose sum is σ = 249813936. Its totient is φ = 83271310.

The previous prime is 166542601. The next prime is 166542671. The reversal of 166542622 is 226245661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 226245661 = 43 ⋅5261527.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41635654 + ... + 41635657.

It is an arithmetic number, because the mean of its divisors is an integer number (62453484).

Almost surely, 2^166542622 is an apocalyptic number.

166542622 is a deficient number, since it is larger than the sum of its proper divisors (83271314).

166542622 is an equidigital number, since it uses as much as digits as its factorization.

166542622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83271313.

The product of its digits is 34560, while the sum is 34.

The square root of 166542622 is about 12905.1393638349. The cubic root of 166542622 is about 550.1846454421.

The spelling of 166542622 in words is "one hundred sixty-six million, five hundred forty-two thousand, six hundred twenty-two".