66342021279 has 8 divisors (see below), whose sum is σ = 88672303920. Its totient is φ = 44119876416.

The previous prime is 66342021257. The next prime is 66342021283. The reversal of 66342021279 is 97212024366.

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

It is not a de Polignac number, because 66342021279 - 2²⁷ = 66207803551 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66342021279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66342020279) 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, 27033012 + ... + 27035465.

It is an arithmetic number, because the mean of its divisors is an integer number (11084037990).

Almost surely, 2^66342021279 is an apocalyptic number.

66342021279 is a deficient number, since it is larger than the sum of its proper divisors (22330282641).

66342021279 is a wasteful number, since it uses less digits than its factorization.

66342021279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54068889.

The product of its (nonzero) digits is 217728, while the sum is 42.

The spelling of 66342021279 in words is "sixty-six billion, three hundred forty-two million, twenty-one thousand, two hundred seventy-nine".