66240378 has 24 divisors (see below), whose sum is σ = 144477216. Its totient is φ = 21933000.

The previous prime is 66240371. The next prime is 66240401. The reversal of 66240378 is 87304266.

It is not an unprimeable number, because it can be changed into a prime (66240371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9468 + ... + 14903.

It is an arithmetic number, because the mean of its divisors is an integer number (6019884).

Almost surely, 2^66240378 is an apocalyptic number.

66240378 is an abundant number, since it is smaller than the sum of its proper divisors (78236838).

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

66240378 is a wasteful number, since it uses less digits than its factorization.

66240378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24530 (or 24527 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 66240378 is about 8138.8192018253. The cubic root of 66240378 is about 404.6140264231.

The spelling of 66240378 in words is "sixty-six million, two hundred forty thousand, three hundred seventy-eight".