66487633 has 8 divisors (see below), whose sum is σ = 69451200. Its totient is φ = 63568848.

The previous prime is 66487579. The next prime is 66487637. The reversal of 66487633 is 33678466.

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 66487633 - 2²¹ = 64390481 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 66487633.

It is not an unprimeable number, because it can be changed into a prime (66487637) 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, 8143 + ... + 14116.

It is an arithmetic number, because the mean of its divisors is an integer number (8681400).

Almost surely, 2^66487633 is an apocalyptic number.

It is an amenable number.

66487633 is a deficient number, since it is larger than the sum of its proper divisors (2963567).

66487633 is a wasteful number, since it uses less digits than its factorization.

66487633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22391.

The product of its digits is 435456, while the sum is 43.

The square root of 66487633 is about 8153.9949104718. The cubic root of 66487633 is about 405.1168346558.

The spelling of 66487633 in words is "sixty-six million, four hundred eighty-seven thousand, six hundred thirty-three".