66045042239 has 4 divisors (see below), whose sum is σ = 72049137000. Its totient is φ = 60040947480.

The previous prime is 66045042113. The next prime is 66045042251. The reversal of 66045042239 is 93224054066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66045042239 - 2⁸ = 66045041983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66045042196 and 66045042205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66045012239) 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, 3002047364 + ... + 3002047385.

It is an arithmetic number, because the mean of its divisors is an integer number (18012284250).

Almost surely, 2^66045042239 is an apocalyptic number.

66045042239 is a deficient number, since it is larger than the sum of its proper divisors (6004094761).

66045042239 is a wasteful number, since it uses less digits than its factorization.

66045042239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6004094760.

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 66045042239 in words is "sixty-six billion, forty-five million, forty-two thousand, two hundred thirty-nine".