66230140 has 24 divisors (see below), whose sum is σ = 141365952. Its totient is φ = 26057280.

The previous prime is 66230137. The next prime is 66230141. The reversal of 66230140 is 4103266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66230141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25924 + ... + 28363.

It is an arithmetic number, because the mean of its divisors is an integer number (5890248).

Almost surely, 2^66230140 is an apocalyptic number.

It is an amenable number.

66230140 is an abundant number, since it is smaller than the sum of its proper divisors (75135812).

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

66230140 is a wasteful number, since it uses less digits than its factorization.

66230140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54357 (or 54355 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 66230140 is about 8138.1902165039. The cubic root of 66230140 is about 404.5931798641.

The spelling of 66230140 in words is "sixty-six million, two hundred thirty thousand, one hundred forty".