66732140 has 24 divisors (see below), whose sum is σ = 148381632. Its totient is φ = 25122560.

The previous prime is 66732139. The next prime is 66732143. The reversal of 66732140 is 4123766.

66732140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66732143) 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 7 ways as a sum of consecutive naturals, for example, 97796 + ... + 98475.

It is an arithmetic number, because the mean of its divisors is an integer number (6182568).

Almost surely, 2^66732140 is an apocalyptic number.

It is an amenable number.

66732140 is an abundant number, since it is smaller than the sum of its proper divisors (81649492).

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

66732140 is a wasteful number, since it uses less digits than its factorization.

66732140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196297 (or 196295 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 66732140 is about 8168.9742318115. The cubic root of 66732140 is about 405.6128302866.

The spelling of 66732140 in words is "sixty-six million, seven hundred thirty-two thousand, one hundred forty".