66020824 has 64 divisors (see below), whose sum is σ = 134830080. Its totient is φ = 30240000.

The previous prime is 66020821. The next prime is 66020827. The reversal of 66020824 is 42802066.

It is an interprime number because it is at equal distance from previous prime (66020821) and next prime (66020827).

It is a junction number, because it is equal to n+sod(n) for n = 66020792 and 66020801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66020821) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 437149 + ... + 437299.

It is an arithmetic number, because the mean of its divisors is an integer number (2106720).

Almost surely, 2^66020824 is an apocalyptic number.

It is an amenable number.

66020824 is an abundant number, since it is smaller than the sum of its proper divisors (68809256).

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

66020824 is a wasteful number, since it uses less digits than its factorization.

66020824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 66020824 is about 8125.3199321627. The cubic root of 66020824 is about 404.1665000082.

The spelling of 66020824 in words is "sixty-six million, twenty thousand, eight hundred twenty-four".