166321828 has 12 divisors (see below), whose sum is σ = 291876480. Its totient is φ = 82928552.

The previous prime is 166321817. The next prime is 166321849. The reversal of 166321828 is 828123661.

It is a happy number.

It is a super-3 number, since 3×166321828³ (a number of 26 digits) contains 333 as substring.

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, 56476 + ... + 59347.

It is an arithmetic number, because the mean of its divisors is an integer number (24323040).

Almost surely, 2^166321828 is an apocalyptic number.

It is an amenable number.

166321828 is a deficient number, since it is larger than the sum of its proper divisors (125554652).

166321828 is a wasteful number, since it uses less digits than its factorization.

166321828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116186 (or 116184 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 166321828 is about 12896.5820278088. The cubic root of 166321828 is about 549.9414020216.

The spelling of 166321828 in words is "one hundred sixty-six million, three hundred twenty-one thousand, eight hundred twenty-eight".