66630120 has 32 divisors (see below), whose sum is σ = 199890720. Its totient is φ = 17768000.

The previous prime is 66630107. The next prime is 66630121. The reversal of 66630120 is 2103666.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (66630121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277506 + ... + 277745.

It is an arithmetic number, because the mean of its divisors is an integer number (6246585).

Almost surely, 2^66630120 is an apocalyptic number.

66630120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66630120 is an abundant number, since it is smaller than the sum of its proper divisors (133260600).

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

66630120 is a wasteful number, since it uses less digits than its factorization.

66630120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555265 (or 555261 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 66630120 is about 8162.7274853446. The cubic root of 66630120 is about 405.4060247582.

Adding to 66630120 its reverse (2103666), we get a palindrome (68733786).

The spelling of 66630120 in words is "sixty-six million, six hundred thirty thousand, one hundred twenty".