66411587 has 8 divisors (see below), whose sum is σ = 73367040. Its totient is φ = 59609160.

The previous prime is 66411577. The next prime is 66411589. The reversal of 66411587 is 78511466.

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 66411587 - 2⁶ = 66411523 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66411587.

It is not an unprimeable number, because it can be changed into a prime (66411589) 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, 37343 + ... + 39080.

It is an arithmetic number, because the mean of its divisors is an integer number (9170880).

Almost surely, 2^66411587 is an apocalyptic number.

66411587 is a deficient number, since it is larger than the sum of its proper divisors (6955453).

66411587 is a wasteful number, since it uses less digits than its factorization.

66411587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76513.

The product of its digits is 40320, while the sum is 38.

The square root of 66411587 is about 8149.3304632957. The cubic root of 66411587 is about 404.9623233762.

It can be divided in two parts, 6641 and 1587, that added together give a palindrome (8228).

The spelling of 66411587 in words is "sixty-six million, four hundred eleven thousand, five hundred eighty-seven".