66534445 has 8 divisors (see below), whose sum is σ = 79962336. Its totient is φ = 53146896.

The previous prime is 66534437. The next prime is 66534449. The reversal of 66534445 is 54443566.

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

It is a cyclic number.

It is not a de Polignac number, because 66534445 - 2³ = 66534437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66534449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6327 + ... + 13156.

It is an arithmetic number, because the mean of its divisors is an integer number (9995292).

Almost surely, 2^66534445 is an apocalyptic number.

It is an amenable number.

66534445 is a deficient number, since it is larger than the sum of its proper divisors (13427891).

66534445 is a wasteful number, since it uses less digits than its factorization.

66534445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20171.

The product of its digits is 172800, while the sum is 37.

The square root of 66534445 is about 8156.8649001930. The cubic root of 66534445 is about 405.2118893269.

The spelling of 66534445 in words is "sixty-six million, five hundred thirty-four thousand, four hundred forty-five".