166071812 has 12 divisors (see below), whose sum is σ = 297714396. Its totient is φ = 81010560.

The previous prime is 166071809. The next prime is 166071839. The reversal of 166071812 is 218170661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 53202436 + 112869376 = 7294^2 + 10624^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 506153 + ... + 506480.

It is an arithmetic number, because the mean of its divisors is an integer number (24809533).

Almost surely, 2^166071812 is an apocalyptic number.

It is an amenable number.

166071812 is a deficient number, since it is larger than the sum of its proper divisors (131642584).

166071812 is a wasteful number, since it uses less digits than its factorization.

166071812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012678 (or 1012676 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 166071812 is about 12886.8852714688. The cubic root of 166071812 is about 549.6657053941.

The spelling of 166071812 in words is "one hundred sixty-six million, seventy-one thousand, eight hundred twelve".