66265120500 has 48 divisors (see below), whose sum is σ = 192964035264. Its totient is φ = 17670698400.

The previous prime is 66265120489. The next prime is 66265120501. The reversal of 66265120500 is 502156266.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66265120501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22086874 + ... + 22089873.

It is an arithmetic number, because the mean of its divisors is an integer number (4020084068).

Almost surely, 2^66265120500 is an apocalyptic number.

66265120500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66265120500 is an abundant number, since it is smaller than the sum of its proper divisors (126698914764).

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

66265120500 is a wasteful number, since it uses less digits than its factorization.

66265120500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44176769 (or 44176757 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 66265120500 its reverse (502156266), we get a palindrome (66767276766).

The spelling of 66265120500 in words is "sixty-six billion, two hundred sixty-five million, one hundred twenty thousand, five hundred".