66080641 has 9 divisors (see below), whose sum is σ = 72732513. Its totient is φ = 59992020.

The previous prime is 66080639. The next prime is 66080659. The reversal of 66080641 is 14608066.

The square root of 66080641 is 8129.

It is a perfect power (a square), and thus also a powerful number.

66080641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66080641 - 2¹ = 66080639 is a prime.

It is a super-2 number, since 2×66080641² = 8733302229941762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66080041) 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 8 ways as a sum of consecutive naturals, for example, 89050 + ... + 89788.

Almost surely, 2^66080641 is an apocalyptic number.

66080641 is the 8129-th square number.

66080641 is the 4065-th centered octagonal number.

It is an amenable number.

66080641 is a deficient number, since it is larger than the sum of its proper divisors (6651872).

66080641 is an frugal number, since it uses more digits than its factorization.

66080641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500 (or 750 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The cubic root of 66080641 is about 404.2885257990.

The spelling of 66080641 in words is "sixty-six million, eighty thousand, six hundred forty-one".