66725416 has 16 divisors (see below), whose sum is σ = 131695200. Its totient is φ = 31606704.

The previous prime is 66725411. The next prime is 66725437. The reversal of 66725416 is 61452766.

It is a happy number.

66725416 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66725416² = 8904562280746112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66725411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219340 + ... + 219643.

It is an arithmetic number, because the mean of its divisors is an integer number (8230950).

Almost surely, 2^66725416 is an apocalyptic number.

It is an amenable number.

66725416 is a deficient number, since it is larger than the sum of its proper divisors (64969784).

66725416 is a wasteful number, since it uses less digits than its factorization.

66725416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439008 (or 439004 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 66725416 is about 8168.5626642635. The cubic root of 66725416 is about 405.5992065051.

The spelling of 66725416 in words is "sixty-six million, seven hundred twenty-five thousand, four hundred sixteen".