66111487 has 8 divisors (see below), whose sum is σ = 75385296. Its totient is φ = 57436032.

The previous prime is 66111457. The next prime is 66111491. The reversal of 66111487 is 78411166.

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 66111487 - 2⁷ = 66111359 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66111457) 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 7 ways as a sum of consecutive naturals, for example, 149353 + ... + 149794.

It is an arithmetic number, because the mean of its divisors is an integer number (9423162).

Almost surely, 2^66111487 is an apocalyptic number.

66111487 is a deficient number, since it is larger than the sum of its proper divisors (9273809).

66111487 is a wasteful number, since it uses less digits than its factorization.

66111487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299177.

The product of its digits is 8064, while the sum is 34.

The square root of 66111487 is about 8130.8970599805. The cubic root of 66111487 is about 404.3514224042.

The spelling of 66111487 in words is "sixty-six million, one hundred eleven thousand, four hundred eighty-seven".