66887807 has 8 divisors (see below), whose sum is σ = 76492800. Its totient is φ = 57295224.

The previous prime is 66887797. The next prime is 66887813. The reversal of 66887807 is 70878866.

It is a happy number.

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

It is not a de Polignac number, because 66887807 - 2⁸ = 66887551 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 (66887827) 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 7 ways as a sum of consecutive naturals, for example, 18494 + ... + 21812.

It is an arithmetic number, because the mean of its divisors is an integer number (9561600).

Almost surely, 2^66887807 is an apocalyptic number.

66887807 is a deficient number, since it is larger than the sum of its proper divisors (9604993).

66887807 is a wasteful number, since it uses less digits than its factorization.

66887807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6205.

The product of its (nonzero) digits is 903168, while the sum is 50.

The square root of 66887807 is about 8178.4966222405. The cubic root of 66887807 is about 405.9279782783.

The spelling of 66887807 in words is "sixty-six million, eight hundred eighty-seven thousand, eight hundred seven".