66136754917 has 8 divisors (see below), whose sum is σ = 69389384192. Its totient is φ = 62954074800.

The previous prime is 66136754897. The next prime is 66136754923. The reversal of 66136754917 is 71945763166.

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

It is a cyclic number.

It is not a de Polignac number, because 66136754917 - 2³⁵ = 31777016549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66136754417) 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, 17485353 + ... + 17489134.

It is an arithmetic number, because the mean of its divisors is an integer number (8673673024).

Almost surely, 2^66136754917 is an apocalyptic number.

It is an amenable number.

66136754917 is a deficient number, since it is larger than the sum of its proper divisors (3252629275).

66136754917 is a wasteful number, since it uses less digits than its factorization.

66136754917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34974579.

The product of its digits is 5715360, while the sum is 55.

The spelling of 66136754917 in words is "sixty-six billion, one hundred thirty-six million, seven hundred fifty-four thousand, nine hundred seventeen".