66617234135 has 4 divisors (see below), whose sum is σ = 79940680968. Its totient is φ = 53293787304.

The previous prime is 66617234069. The next prime is 66617234137. The reversal of 66617234135 is 53143271666.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66617234135 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 (66617234137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6661723409 + ... + 6661723418.

It is an arithmetic number, because the mean of its divisors is an integer number (19985170242).

Almost surely, 2^66617234135 is an apocalyptic number.

66617234135 is a deficient number, since it is larger than the sum of its proper divisors (13323446833).

66617234135 is a wasteful number, since it uses less digits than its factorization.

66617234135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13323446832.

The product of its digits is 544320, while the sum is 44.

The spelling of 66617234135 in words is "sixty-six billion, six hundred seventeen million, two hundred thirty-four thousand, one hundred thirty-five".