66410520 has 64 divisors (see below), whose sum is σ = 217347840. Its totient is φ = 16099200.

The previous prime is 66410507. The next prime is 66410521. The reversal of 66410520 is 2501466.

66410520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66410521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23836 + ... + 26475.

It is an arithmetic number, because the mean of its divisors is an integer number (3396060).

Almost surely, 2^66410520 is an apocalyptic number.

66410520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66410520 is an abundant number, since it is smaller than the sum of its proper divisors (150937320).

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

66410520 is a wasteful number, since it uses less digits than its factorization.

66410520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50336 (or 50332 counting only the distinct ones).

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

The square root of 66410520 is about 8149.2649975320. The cubic root of 66410520 is about 404.9601545924.

Adding to 66410520 its reverse (2501466), we get a palindrome (68911986).

The spelling of 66410520 in words is "sixty-six million, four hundred ten thousand, five hundred twenty".