660688825007 has 4 divisors (see below), whose sum is σ = 695461921080. Its totient is φ = 625915728936.

The previous prime is 660688824979. The next prime is 660688825037. The reversal of 660688825007 is 700528886066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 660688825007 - 2¹⁰ = 660688823983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660688825037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17386548008 + ... + 17386548045.

It is an arithmetic number, because the mean of its divisors is an integer number (173865480270).

Almost surely, 2^660688825007 is an apocalyptic number.

660688825007 is a deficient number, since it is larger than the sum of its proper divisors (34773096073).

660688825007 is a wasteful number, since it uses less digits than its factorization.

660688825007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34773096072.

The product of its (nonzero) digits is 7741440, while the sum is 56.

The spelling of 660688825007 in words is "six hundred sixty billion, six hundred eighty-eight million, eight hundred twenty-five thousand, seven".