660566251288 has 8 divisors (see below), whose sum is σ = 1238561721180. Its totient is φ = 330283125640.

The previous prime is 660566251283. The next prime is 660566251297. The reversal of 660566251288 is 882152665066.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660566251283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41285390698 + ... + 41285390713.

Almost surely, 2^660566251288 is an apocalyptic number.

It is an amenable number.

660566251288 is a deficient number, since it is larger than the sum of its proper divisors (577995469892).

660566251288 is a wasteful number, since it uses less digits than its factorization.

660566251288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82570781417 (or 82570781413 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 55.

The spelling of 660566251288 in words is "six hundred sixty billion, five hundred sixty-six million, two hundred fifty-one thousand, two hundred eighty-eight".