66000487 has 4 divisors (see below), whose sum is σ = 75429136. Its totient is φ = 56571840.

The previous prime is 66000479. The next prime is 66000497. The reversal of 66000487 is 78400066.

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 66000487 - 2³ = 66000479 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 (66000497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4714314 + ... + 4714327.

It is an arithmetic number, because the mean of its divisors is an integer number (18857284).

Almost surely, 2^66000487 is an apocalyptic number.

66000487 is a deficient number, since it is larger than the sum of its proper divisors (9428649).

66000487 is an equidigital number, since it uses as much as digits as its factorization.

66000487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9428648.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 66000487 is about 8124.0683773587. The cubic root of 66000487 is about 404.1249960415.

The spelling of 66000487 in words is "sixty-six million, four hundred eighty-seven", and thus it is an aban number.