66132740 has 24 divisors (see below), whose sum is σ = 140555520. Its totient is φ = 26133728.

The previous prime is 66132739. The next prime is 66132763. The reversal of 66132740 is 4723166.

66132740 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

66132740 is strictly pandigital in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18260 + ... + 21579.

It is an arithmetic number, because the mean of its divisors is an integer number (5856480).

Almost surely, 2^66132740 is an apocalyptic number.

It is an amenable number.

66132740 is an abundant number, since it is smaller than the sum of its proper divisors (74422780).

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

66132740 is a wasteful number, since it uses less digits than its factorization.

66132740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39931 (or 39929 counting only the distinct ones).

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

The square root of 66132740 is about 8132.2038833271. The cubic root of 66132740 is about 404.3947469986.

The spelling of 66132740 in words is "sixty-six million, one hundred thirty-two thousand, seven hundred forty".