66410920 has 32 divisors (see below), whose sum is σ = 152903520. Its totient is φ = 25945920.

The previous prime is 66410881. The next prime is 66410921. The reversal of 66410920 is 2901466.

It is not an unprimeable number, because it can be changed into a prime (66410921) 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, 17586 + ... + 21025.

It is an arithmetic number, because the mean of its divisors is an integer number (4778235).

Almost surely, 2^66410920 is an apocalyptic number.

It is an amenable number.

66410920 is an abundant number, since it is smaller than the sum of its proper divisors (86492600).

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

66410920 is a wasteful number, since it uses less digits than its factorization.

66410920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38665 (or 38661 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 66410920 is about 8149.2895395856. The cubic root of 66410920 is about 404.9609676350.

The spelling of 66410920 in words is "sixty-six million, four hundred ten thousand, nine hundred twenty".