66544059 has 8 divisors (see below), whose sum is σ = 88929280. Its totient is φ = 44260776.

The previous prime is 66544031. The next prime is 66544139. The reversal of 66544059 is 95044566.

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

It is not a de Polignac number, because 66544059 - 2¹¹ = 66542011 is a prime.

It is a super-2 number, since 2×66544059² = 8856223576390962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66544459) 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, 23947 + ... + 26580.

It is an arithmetic number, because the mean of its divisors is an integer number (11116160).

Almost surely, 2^66544059 is an apocalyptic number.

66544059 is a deficient number, since it is larger than the sum of its proper divisors (22385221).

66544059 is a wasteful number, since it uses less digits than its factorization.

66544059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50969.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 66544059 is about 8157.4541984617. The cubic root of 66544059 is about 405.2314056315.

The spelling of 66544059 in words is "sixty-six million, five hundred forty-four thousand, fifty-nine".