66042212573 has 4 divisors (see below), whose sum is σ = 67447366080. Its totient is φ = 64637059068.

The previous prime is 66042212563. The next prime is 66042212591. The reversal of 66042212573 is 37521224066.

66042212573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37521224066 = 2 ⋅18760612033.

It is a cyclic number.

It is not a de Polignac number, because 66042212573 - 2¹⁴ = 66042196189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66042212563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702576683 + ... + 702576776.

It is an arithmetic number, because the mean of its divisors is an integer number (16861841520).

Almost surely, 2^66042212573 is an apocalyptic number.

It is an amenable number.

66042212573 is a deficient number, since it is larger than the sum of its proper divisors (1405153507).

66042212573 is a wasteful number, since it uses less digits than its factorization.

66042212573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405153506.

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 66042212573 in words is "sixty-six billion, forty-two million, two hundred twelve thousand, five hundred seventy-three".