66575225680 has 40 divisors (see below), whose sum is σ = 155233537632. Its totient is φ = 26553335424.

The previous prime is 66575225677. The next prime is 66575225719. The reversal of 66575225680 is 8652257566.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1171362 + ... + 1226881.

Almost surely, 2^66575225680 is an apocalyptic number.

It is an amenable number.

66575225680 is an abundant number, since it is smaller than the sum of its proper divisors (88658311952).

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

66575225680 is a wasteful number, since it uses less digits than its factorization.

66575225680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398603 (or 2398597 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 52.

The spelling of 66575225680 in words is "sixty-six billion, five hundred seventy-five million, two hundred twenty-five thousand, six hundred eighty".