166722312 has 32 divisors (see below), whose sum is σ = 424673280. Its totient is φ = 54525120.

The previous prime is 166722251. The next prime is 166722313. The reversal of 166722312 is 213227661.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 166722312.

It is not an unprimeable number, because it can be changed into a prime (166722313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64264 + ... + 66807.

It is an arithmetic number, because the mean of its divisors is an integer number (13271040).

Almost surely, 2^166722312 is an apocalyptic number.

166722312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166722312 is an abundant number, since it is smaller than the sum of its proper divisors (257950968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166722312 is a wasteful number, since it uses less digits than its factorization.

166722312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131133 (or 131129 counting only the distinct ones).

The product of its digits is 6048, while the sum is 30.

The square root of 166722312 is about 12912.0994419963. The cubic root of 166722312 is about 550.3824469484.

Adding to 166722312 its reverse (213227661), we get a palindrome (379949973).

The spelling of 166722312 in words is "one hundred sixty-six million, seven hundred twenty-two thousand, three hundred twelve".