66485716 has 24 divisors (see below), whose sum is σ = 127149120. Its totient is φ = 30168000.

The previous prime is 66485677. The next prime is 66485717. The reversal of 66485716 is 61758466.

It is a happy number.

It is a super-3 number, since 3×66485716³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66485717) 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, 36016 + ... + 37816.

It is an arithmetic number, because the mean of its divisors is an integer number (5297880).

Almost surely, 2^66485716 is an apocalyptic number.

It is an amenable number.

66485716 is a deficient number, since it is larger than the sum of its proper divisors (60663404).

66485716 is a wasteful number, since it uses less digits than its factorization.

66485716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655 (or 2653 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 66485716 is about 8153.8773598822. The cubic root of 66485716 is about 405.1129411175.

The spelling of 66485716 in words is "sixty-six million, four hundred eighty-five thousand, seven hundred sixteen".