66132738 has 24 divisors (see below), whose sum is σ = 163757568. Its totient is φ = 18895032.

The previous prime is 66132721. The next prime is 66132739. The reversal of 66132738 is 83723166.

It is a happy number.

66132738 is a `hidden beast` number, since 6 + 613 + 2 + 7 + 38 = 666.

It is a super-3 number, since 3×66132738³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66132739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 262306 + ... + 262557.

It is an arithmetic number, because the mean of its divisors is an integer number (6823232).

Almost surely, 2^66132738 is an apocalyptic number.

66132738 is an abundant number, since it is smaller than the sum of its proper divisors (97624830).

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

66132738 is a wasteful number, since it uses less digits than its factorization.

66132738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524878 (or 524875 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 66132738 is about 8132.2037603592. The cubic root of 66132738 is about 404.3947429220.

The spelling of 66132738 in words is "sixty-six million, one hundred thirty-two thousand, seven hundred thirty-eight".