166222996 has 6 divisors (see below), whose sum is σ = 290890250. Its totient is φ = 83111496.

The previous prime is 166222967. The next prime is 166223017. The reversal of 166222996 is 699222661.

It can be written as a sum of positive squares in only one way, i.e., 116942596 + 49280400 = 10814^2 + 7020^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20777871 + ... + 20777878.

Almost surely, 2^166222996 is an apocalyptic number.

It is an amenable number.

166222996 is a deficient number, since it is larger than the sum of its proper divisors (124667254).

166222996 is a wasteful number, since it uses less digits than its factorization.

166222996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41555753 (or 41555751 counting only the distinct ones).

The product of its digits is 139968, while the sum is 43.

The square root of 166222996 is about 12892.7497454965. The cubic root of 166222996 is about 549.8324514436.

The spelling of 166222996 in words is "one hundred sixty-six million, two hundred twenty-two thousand, nine hundred ninety-six".