166012740 has 72 divisors (see below), whose sum is σ = 522238080. Its totient is φ = 44268768.

The previous prime is 166012739. The next prime is 166012741. The reversal of 166012740 is 47210661.

166012740 is a `hidden beast` number, since 16 + 601 + 2 + 7 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (166012739) and next prime (166012741).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (166012741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12220 + ... + 21939.

Almost surely, 2^166012740 is an apocalyptic number.

166012740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166012740 is an abundant number, since it is smaller than the sum of its proper divisors (356225340).

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

166012740 is a wasteful number, since it uses less digits than its factorization.

166012740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34183 (or 34169 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 166012740 is about 12884.5931251243. The cubic root of 166012740 is about 549.6005253518.

It can be divided in two parts, 1660 and 12740, that added together give a square (14400 = 120²).

The spelling of 166012740 in words is "one hundred sixty-six million, twelve thousand, seven hundred forty".