66706607625 has 64 divisors (see below), whose sum is σ = 126992406528. Its totient is φ = 30461880000.

The previous prime is 66706607609. The next prime is 66706607641. The reversal of 66706607625 is 52670660766.

It is an interprime number because it is at equal distance from previous prime (66706607609) and next prime (66706607641).

It is not a de Polignac number, because 66706607625 - 2⁴ = 66706607609 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2535790 + ... + 2561960.

It is an arithmetic number, because the mean of its divisors is an integer number (1984256352).

Almost surely, 2^66706607625 is an apocalyptic number.

It is an amenable number.

66706607625 is a deficient number, since it is larger than the sum of its proper divisors (60285798903).

66706607625 is a wasteful number, since it uses less digits than its factorization.

66706607625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27167 (or 27157 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 51.

The spelling of 66706607625 in words is "sixty-six billion, seven hundred six million, six hundred seven thousand, six hundred twenty-five".