66525788 has 12 divisors (see below), whose sum is σ = 133051632. Its totient is φ = 28511040.

The previous prime is 66525763. The next prime is 66525827. The reversal of 66525788 is 88752566.

66525788 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1187933 + ... + 1187988.

It is an arithmetic number, because the mean of its divisors is an integer number (11087636).

Almost surely, 2^66525788 is an apocalyptic number.

It is an amenable number.

66525788 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66525788 is a wasteful number, since it uses less digits than its factorization.

66525788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2375932 (or 2375930 counting only the distinct ones).

The product of its digits is 806400, while the sum is 47.

The square root of 66525788 is about 8156.3342256188. The cubic root of 66525788 is about 405.1943141121.

The spelling of 66525788 in words is "sixty-six million, five hundred twenty-five thousand, seven hundred eighty-eight".