66140360242 has 24 divisors (see below), whose sum is σ = 114970640400. Its totient is φ = 28295338560.

The previous prime is 66140360219. The next prime is 66140360249. The reversal of 66140360242 is 24206304166.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 66140360198 and 66140360207.

It is not an unprimeable number, because it can be changed into a prime (66140360249) 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, 5194992 + ... + 5207707.

It is an arithmetic number, because the mean of its divisors is an integer number (4790443350).

Almost surely, 2^66140360242 is an apocalyptic number.

66140360242 is a deficient number, since it is larger than the sum of its proper divisors (48830280158).

66140360242 is a wasteful number, since it uses less digits than its factorization.

66140360242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10402746 (or 10402729 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The spelling of 66140360242 in words is "sixty-six billion, one hundred forty million, three hundred sixty thousand, two hundred forty-two".