66060621 has 24 divisors (see below), whose sum is σ = 105811680. Its totient is φ = 39376800.

The previous prime is 66060611. The next prime is 66060629. The reversal of 66060621 is 12606066.

It is not a de Polignac number, because 66060621 - 2⁶ = 66060557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66060629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 570 + ... + 11508.

It is an arithmetic number, because the mean of its divisors is an integer number (4408820).

Almost surely, 2^66060621 is an apocalyptic number.

66060621 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

66060621 is a deficient number, since it is larger than the sum of its proper divisors (39751059).

66060621 is a wasteful number, since it uses less digits than its factorization.

66060621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11017 (or 11014 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 66060621 is about 8127.7685129438. The cubic root of 66060621 is about 404.2476934984.

Adding to 66060621 its reverse (12606066), we get a palindrome (78666687).

The spelling of 66060621 in words is "sixty-six million, sixty thousand, six hundred twenty-one".