166420212 has 96 divisors (see below), whose sum is σ = 468115200. Its totient is φ = 45007872.

The previous prime is 166420201. The next prime is 166420273. The reversal of 166420212 is 212024661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128464 + ... + 129752.

It is an arithmetic number, because the mean of its divisors is an integer number (4876200).

Almost surely, 2^166420212 is an apocalyptic number.

166420212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166420212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234057600).

166420212 is an abundant number, since it is smaller than the sum of its proper divisors (301694988).

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

166420212 is a wasteful number, since it uses less digits than its factorization.

166420212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385 (or 1383 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 166420212 is about 12900.3958078812. The cubic root of 166420212 is about 550.0498158735.

Adding to 166420212 its reverse (212024661), we get a palindrome (378444873).

The spelling of 166420212 in words is "one hundred sixty-six million, four hundred twenty thousand, two hundred twelve".