66385113751 has 8 divisors (see below), whose sum is σ = 72497096208. Its totient is φ = 60285960000.

The previous prime is 66385113727. The next prime is 66385113787. The reversal of 66385113751 is 15731158366.

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 66385113751 - 2⁵ = 66385113719 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 (66385113791) 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, 3196350 + ... + 3217051.

It is an arithmetic number, because the mean of its divisors is an integer number (9062137026).

Almost surely, 2^66385113751 is an apocalyptic number.

66385113751 is a deficient number, since it is larger than the sum of its proper divisors (6111982457).

66385113751 is a wasteful number, since it uses less digits than its factorization.

66385113751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6414353.

The product of its digits is 453600, while the sum is 46.

The spelling of 66385113751 in words is "sixty-six billion, three hundred eighty-five million, one hundred thirteen thousand, seven hundred fifty-one".