66020600 has 24 divisors (see below), whose sum is σ = 153498360. Its totient is φ = 26408160.

The previous prime is 66020593. The next prime is 66020621. The reversal of 66020600 is 602066.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 164852 + ... + 165251.

It is an arithmetic number, because the mean of its divisors is an integer number (6395765).

Almost surely, 2^66020600 is an apocalyptic number.

It is an amenable number.

66020600 is an abundant number, since it is smaller than the sum of its proper divisors (87477760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66020600 is a wasteful number, since it uses less digits than its factorization.

66020600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330119 (or 330110 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 66020600 is about 8125.3061480784. The cubic root of 66020600 is about 404.1660429130.

Adding to 66020600 its reverse (602066), we get a palindrome (66622666).

The spelling of 66020600 in words is "sixty-six million, twenty thousand, six hundred".