166220354 has 16 divisors (see below), whose sum is σ = 256446648. Its totient is φ = 80744832.

The previous prime is 166220323. The next prime is 166220359. The reversal of 166220354 is 453022661.

It can be written as a sum of positive squares in 4 ways, for example, as 143400625 + 22819729 = 11975^2 + 4777^2 .

It is not an unprimeable number, because it can be changed into a prime (166220359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69344 + ... + 71700.

Almost surely, 2^166220354 is an apocalyptic number.

166220354 is a deficient number, since it is larger than the sum of its proper divisors (90226294).

166220354 is a wasteful number, since it uses less digits than its factorization.

166220354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3349.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 166220354 is about 12892.6472844021. The cubic root of 166220354 is about 549.8295383588.

The spelling of 166220354 in words is "one hundred sixty-six million, two hundred twenty thousand, three hundred fifty-four".