66826020 has 48 divisors (see below), whose sum is σ = 187467840. Its totient is φ = 17786496.

The previous prime is 66826009. The next prime is 66826027. The reversal of 66826020 is 2062866.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (66826027) 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, 60594 + ... + 61686.

It is an arithmetic number, because the mean of its divisors is an integer number (3905580).

Almost surely, 2^66826020 is an apocalyptic number.

66826020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66826020 is an abundant number, since it is smaller than the sum of its proper divisors (120641820).

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

66826020 is a wasteful number, since it uses less digits than its factorization.

66826020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2124 (or 2122 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 66826020 is about 8174.7183437719. The cubic root of 66826020 is about 405.8029490197.

Adding to 66826020 its reverse (2062866), we get a palindrome (68888886).

The spelling of 66826020 in words is "sixty-six million, eight hundred twenty-six thousand, twenty".