166227940 has 24 divisors (see below), whose sum is σ = 357594552. Its totient is φ = 64869120.

The previous prime is 166227917. The next prime is 166227947. The reversal of 166227940 is 49722661.

166227940 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 12616704 + 153611236 = 3552^2 + 12394^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 166227940.

It is not an unprimeable number, because it can be changed into a prime (166227947) 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, 100539 + ... + 102178.

It is an arithmetic number, because the mean of its divisors is an integer number (14899773).

Almost surely, 2^166227940 is an apocalyptic number.

166227940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166227940 is an abundant number, since it is smaller than the sum of its proper divisors (191366612).

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

166227940 is a wasteful number, since it uses less digits than its factorization.

166227940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202767 (or 202765 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 166227940 is about 12892.9414797400. The cubic root of 166227940 is about 549.8379026442.

The spelling of 166227940 in words is "one hundred sixty-six million, two hundred twenty-seven thousand, nine hundred forty".