660122425615 has 4 divisors (see below), whose sum is σ = 792146910744. Its totient is φ = 528097940488.

The previous prime is 660122425603. The next prime is 660122425673. The reversal of 660122425615 is 516524221066.

It is a happy number.

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 660122425615 - 2²⁷ = 659988207887 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66012242557 + ... + 66012242566.

It is an arithmetic number, because the mean of its divisors is an integer number (198036727686).

Almost surely, 2^660122425615 is an apocalyptic number.

660122425615 is a deficient number, since it is larger than the sum of its proper divisors (132024485129).

660122425615 is a wasteful number, since it uses less digits than its factorization.

660122425615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132024485128.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 660122425615 in words is "six hundred sixty billion, one hundred twenty-two million, four hundred twenty-five thousand, six hundred fifteen".