166228636 has 24 divisors (see below), whose sum is σ = 346913280. Its totient is φ = 68143152.

The previous prime is 166228633. The next prime is 166228639. The reversal of 166228636 is 636822661.

It is a happy number.

166228636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (166228633) and next prime (166228639).

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166228631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128416 + ... + 129703.

It is an arithmetic number, because the mean of its divisors is an integer number (14454720).

Almost surely, 2^166228636 is an apocalyptic number.

It is an amenable number.

166228636 is an abundant number, since it is smaller than the sum of its proper divisors (180684644).

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

166228636 is a wasteful number, since it uses less digits than its factorization.

166228636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258153 (or 258151 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 166228636 is about 12892.9684712249. The cubic root of 166228636 is about 549.8386700375.

The spelling of 166228636 in words is "one hundred sixty-six million, two hundred twenty-eight thousand, six hundred thirty-six".