66522120 has 64 divisors (see below), whose sum is σ = 228078720. Its totient is φ = 15204864.

The previous prime is 66522119. The next prime is 66522163. The reversal of 66522120 is 2122566.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38757 + ... + 40436.

It is an arithmetic number, because the mean of its divisors is an integer number (3563730).

Almost surely, 2^66522120 is an apocalyptic number.

66522120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66522120 is an abundant number, since it is smaller than the sum of its proper divisors (161556600).

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

66522120 is a wasteful number, since it uses less digits than its factorization.

66522120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79214 (or 79210 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 66522120 is about 8156.1093666037. The cubic root of 66522120 is about 405.1868669747.

Adding to 66522120 its reverse (2122566), we get a palindrome (68644686).

The spelling of 66522120 in words is "sixty-six million, five hundred twenty-two thousand, one hundred twenty".