66088529 has 4 divisors (see below), whose sum is σ = 71172276. Its totient is φ = 61004784.

The previous prime is 66088511. The next prime is 66088531. The reversal of 66088529 is 92588066.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5870929 + 60217600 = 2423^2 + 7760^2 .

It is a cyclic number.

It is not a de Polignac number, because 66088529 - 2¹² = 66084433 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 66088529.

It is not an unprimeable number, because it can be changed into a prime (66088829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2541854 + ... + 2541879.

It is an arithmetic number, because the mean of its divisors is an integer number (17793069).

Almost surely, 2^66088529 is an apocalyptic number.

It is an amenable number.

66088529 is a deficient number, since it is larger than the sum of its proper divisors (5083747).

66088529 is a wasteful number, since it uses less digits than its factorization.

66088529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5083746.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 66088529 is about 8129.4851620505. The cubic root of 66088529 is about 404.3046117054.

The spelling of 66088529 in words is "sixty-six million, eighty-eight thousand, five hundred twenty-nine".