66240242 has 16 divisors (see below), whose sum is σ = 102816000. Its totient is φ = 31973520.

The previous prime is 66240241. The next prime is 66240247. The reversal of 66240242 is 24204266.

It is not an unprimeable number, because it can be changed into a prime (66240241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30509 + ... + 32607.

It is an arithmetic number, because the mean of its divisors is an integer number (6426000).

Almost surely, 2^66240242 is an apocalyptic number.

66240242 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

66240242 is a deficient number, since it is larger than the sum of its proper divisors (36575758).

66240242 is a wasteful number, since it uses less digits than its factorization.

66240242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2641.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 66240242 is about 8138.8108468007. The cubic root of 66240242 is about 404.6137495147.

It can be divided in two parts, 662 and 40242, that added together give a palindrome (40904).

The spelling of 66240242 in words is "sixty-six million, two hundred forty thousand, two hundred forty-two".