66484869 has 16 divisors (see below), whose sum is σ = 97796160. Its totient is φ = 39839360.

The previous prime is 66484861. The next prime is 66484879. The reversal of 66484869 is 96848466.

It is not a de Polignac number, because 66484869 - 2³ = 66484861 is a prime.

It is a super-2 number, since 2×66484869² = 8840475611894322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66484861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8382 + ... + 14255.

It is an arithmetic number, because the mean of its divisors is an integer number (6112260).

Almost surely, 2^66484869 is an apocalyptic number.

It is an amenable number.

66484869 is a deficient number, since it is larger than the sum of its proper divisors (31311291).

66484869 is a wasteful number, since it uses less digits than its factorization.

66484869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22740.

The product of its digits is 1990656, while the sum is 51.

The square root of 66484869 is about 8153.8254212363. The cubic root of 66484869 is about 405.1112207875. Note that the first 3 decimals are identical.

The spelling of 66484869 in words is "sixty-six million, four hundred eighty-four thousand, eight hundred sixty-nine".