66524825140 has 48 divisors (see below), whose sum is σ = 142551048528. Its totient is φ = 26068783104.

The previous prime is 66524825099. The next prime is 66524825177. The reversal of 66524825140 is 4152842566.

66524825140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 3259496464 + 63265328676 = 57092^2 + 251526^2 .

It is a congruent number.

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, 666754 + ... + 760006.

It is an arithmetic number, because the mean of its divisors is an integer number (2969813511).

Almost surely, 2^66524825140 is an apocalyptic number.

It is an amenable number.

66524825140 is an abundant number, since it is smaller than the sum of its proper divisors (76026223388).

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

66524825140 is a wasteful number, since it uses less digits than its factorization.

66524825140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93988 (or 93986 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 43.

The spelling of 66524825140 in words is "sixty-six billion, five hundred twenty-four million, eight hundred twenty-five thousand, one hundred forty".