66448529 has 16 divisors (see below), whose sum is σ = 84643200. Its totient is φ = 50782464.

The previous prime is 66448517. The next prime is 66448537. The reversal of 66448529 is 92584466.

It is a cyclic number.

It is not a de Polignac number, because 66448529 - 2⁴ = 66448513 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 66448529.

It is not an unprimeable number, because it can be changed into a prime (66448579) 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, 12434 + ... + 16955.

It is an arithmetic number, because the mean of its divisors is an integer number (5290200).

Almost surely, 2^66448529 is an apocalyptic number.

It is an amenable number.

66448529 is a deficient number, since it is larger than the sum of its proper divisors (18194671).

66448529 is a wasteful number, since it uses less digits than its factorization.

66448529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29432.

The product of its digits is 414720, while the sum is 44.

The square root of 66448529 is about 8151.5967147547. The cubic root of 66448529 is about 405.0373973494.

The spelling of 66448529 in words is "sixty-six million, four hundred forty-eight thousand, five hundred twenty-nine".