66769852520 has 96 divisors (see below), whose sum is σ = 175426318080. Its totient is φ = 22405238400.

The previous prime is 66769852519. The next prime is 66769852529. The reversal of 66769852520 is 2525896766.

66769852520 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 (56).

It is not an unprimeable number, because it can be changed into a prime (66769852529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 564545 + ... + 672495.

It is an arithmetic number, because the mean of its divisors is an integer number (1827357480).

Almost surely, 2^66769852520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66769852520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87713159040).

66769852520 is an abundant number, since it is smaller than the sum of its proper divisors (108656465560).

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

66769852520 is a wasteful number, since it uses less digits than its factorization.

66769852520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108063 (or 108012 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 56.

The spelling of 66769852520 in words is "sixty-six billion, seven hundred sixty-nine million, eight hundred fifty-two thousand, five hundred twenty".