166011840 has 168 divisors, whose sum is σ = 581284080. Its totient is φ = 43474944.

The previous prime is 166011827. The next prime is 166011841. The reversal of 166011840 is 48110661.

166011840 is a `hidden beast` number, since 1 + 6 + 601 + 18 + 40 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166011841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 169432 + ... + 170408.

Almost surely, 2^166011840 is an apocalyptic number.

166011840 is a gapful number since it is divisible by the number (10) 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 166011840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290642040).

166011840 is an abundant number, since it is smaller than the sum of its proper divisors (415272240).

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

166011840 is a wasteful number, since it uses less digits than its factorization.

166011840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059 (or 1046 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 166011840 is about 12884.5581996435. The cubic root of 166011840 is about 549.5995321723.

The spelling of 166011840 in words is "one hundred sixty-six million, eleven thousand, eight hundred forty".