166742140 has 24 divisors (see below), whose sum is σ = 354594240. Its totient is φ = 65851968.

The previous prime is 166742131. The next prime is 166742153. The reversal of 166742140 is 41247661.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 51187 + ... + 54346.

It is an arithmetic number, because the mean of its divisors is an integer number (14774760).

Almost surely, 2^166742140 is an apocalyptic number.

166742140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166742140 is an abundant number, since it is smaller than the sum of its proper divisors (187852100).

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

166742140 is a wasteful number, since it uses less digits than its factorization.

166742140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105621 (or 105619 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 166742140 is about 12912.8672261431. The cubic root of 166742140 is about 550.4042647652.

The spelling of 166742140 in words is "one hundred sixty-six million, seven hundred forty-two thousand, one hundred forty".