66466689 has 8 divisors (see below), whose sum is σ = 91017600. Its totient is φ = 43113456.

The previous prime is 66466681. The next prime is 66466703. The reversal of 66466689 is 98666466.

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

It is not a de Polignac number, because 66466689 - 2³ = 66466681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66466681) 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, 299289 + ... + 299510.

It is an arithmetic number, because the mean of its divisors is an integer number (11377200).

Almost surely, 2^66466689 is an apocalyptic number.

It is an amenable number.

66466689 is a deficient number, since it is larger than the sum of its proper divisors (24550911).

66466689 is a wasteful number, since it uses less digits than its factorization.

66466689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598839.

The product of its digits is 2239488, while the sum is 51.

The square root of 66466689 is about 8152.7105308603. The cubic root of 66466689 is about 405.0742921173.

The spelling of 66466689 in words is "sixty-six million, four hundred sixty-six thousand, six hundred eighty-nine".