66042142345 has 4 divisors (see below), whose sum is σ = 79250570820. Its totient is φ = 52833713872.

The previous prime is 66042142333. The next prime is 66042142381. The reversal of 66042142345 is 54324124066.

66042142345 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.

It can be written as a sum of positive squares in 2 ways, for example, as 42837408784 + 23204733561 = 206972^2 + 152331^2 .

It is a cyclic number.

It is not a de Polignac number, because 66042142345 - 2¹³ = 66042134153 is a prime.

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, 6604214230 + ... + 6604214239.

It is an arithmetic number, because the mean of its divisors is an integer number (19812642705).

Almost surely, 2^66042142345 is an apocalyptic number.

It is an amenable number.

66042142345 is a deficient number, since it is larger than the sum of its proper divisors (13208428475).

66042142345 is a wasteful number, since it uses less digits than its factorization.

66042142345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13208428474.

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 66042142345 in words is "sixty-six billion, forty-two million, one hundred forty-two thousand, three hundred forty-five".