660506107207 has 4 divisors (see below), whose sum is σ = 678357623656. Its totient is φ = 642654590760.

The previous prime is 660506107187. The next prime is 660506107277. The reversal of 660506107207 is 702701605066.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 702701605066 = 2 ⋅351350802533.

It is a cyclic number.

It is not a de Polignac number, because 660506107207 - 2³⁵ = 626146368839 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 660506107207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660506107277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8925758169 + ... + 8925758242.

It is an arithmetic number, because the mean of its divisors is an integer number (169589405914).

Almost surely, 2^660506107207 is an apocalyptic number.

660506107207 is a deficient number, since it is larger than the sum of its proper divisors (17851516449).

660506107207 is a wasteful number, since it uses less digits than its factorization.

660506107207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17851516448.

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 660506107207 in words is "six hundred sixty billion, five hundred six million, one hundred seven thousand, two hundred seven".