66542441266 has 8 divisors (see below), whose sum is σ = 114072756480. Its totient is φ = 28518189108.

The previous prime is 66542441249. The next prime is 66542441309. The reversal of 66542441266 is 66214424566.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2376515746 + ... + 2376515773.

It is an arithmetic number, because the mean of its divisors is an integer number (14259094560).

Almost surely, 2^66542441266 is an apocalyptic number.

66542441266 is a deficient number, since it is larger than the sum of its proper divisors (47530315214).

66542441266 is a wasteful number, since it uses less digits than its factorization.

66542441266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4753031528.

The product of its digits is 1658880, while the sum is 46.

The spelling of 66542441266 in words is "sixty-six billion, five hundred forty-two million, four hundred forty-one thousand, two hundred sixty-six".