166219628 has 12 divisors (see below), whose sum is σ = 292093032. Its totient is φ = 82764480.

The previous prime is 166219531. The next prime is 166219709. The reversal of 166219628 is 826912661.

It is a happy number.

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, 85250 + ... + 87177.

It is an arithmetic number, because the mean of its divisors is an integer number (24341086).

Almost surely, 2^166219628 is an apocalyptic number.

It is an amenable number.

166219628 is a deficient number, since it is larger than the sum of its proper divisors (125873404).

166219628 is a wasteful number, since it uses less digits than its factorization.

166219628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172672 (or 172670 counting only the distinct ones).

The product of its digits is 62208, while the sum is 41.

The square root of 166219628 is about 12892.6191287884. The cubic root of 166219628 is about 549.8287378615.

The spelling of 166219628 in words is "one hundred sixty-six million, two hundred nineteen thousand, six hundred twenty-eight".