660913108407 has 24 divisors (see below), whose sum is σ = 1011587930496. Its totient is φ = 414370722816.

The previous prime is 660913108399. The next prime is 660913108439. The reversal of 660913108407 is 704801319066.

It is a happy number.

660913108407 is a `hidden beast` number, since 6 + 609 + 1 + 31 + 0 + 8 + 4 + 0 + 7 = 666.

It is not a de Polignac number, because 660913108407 - 2³ = 660913108399 is a prime.

It is a super-2 number, since 2×660913108407² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660913108477) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1466823 + ... + 1863704.

It is an arithmetic number, because the mean of its divisors is an integer number (42149497104).

Almost surely, 2^660913108407 is an apocalyptic number.

660913108407 is a deficient number, since it is larger than the sum of its proper divisors (350674822089).

660913108407 is a wasteful number, since it uses less digits than its factorization.

660913108407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3331847 (or 3331844 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 660913108407 in words is "six hundred sixty billion, nine hundred thirteen million, one hundred eight thousand, four hundred seven".