660261340 has 24 divisors (see below), whose sum is σ = 1387047312. Its totient is φ = 264009600.

The previous prime is 660261323. The next prime is 660261347. The reversal of 660261340 is 43162066.

It is a junction number, because it is equal to n+sod(n) for n = 660261299 and 660261308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660261347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85312 + ... + 92728.

It is an arithmetic number, because the mean of its divisors is an integer number (57793638).

Almost surely, 2^660261340 is an apocalyptic number.

It is an amenable number.

660261340 is an abundant number, since it is smaller than the sum of its proper divisors (726785972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660261340 is a wasteful number, since it uses less digits than its factorization.

660261340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11877 (or 11875 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 660261340 is about 25695.5509767742. The cubic root of 660261340 is about 870.7736721157.

The spelling of 660261340 in words is "six hundred sixty million, two hundred sixty-one thousand, three hundred forty".