660784540 has 24 divisors (see below), whose sum is σ = 1494390240. Its totient is φ = 243981888.

The previous prime is 660784493. The next prime is 660784541. The reversal of 660784540 is 45487066.

660784540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 660784493 and 660784502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660784541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1270480 + ... + 1270999.

It is an arithmetic number, because the mean of its divisors is an integer number (62266260).

Almost surely, 2^660784540 is an apocalyptic number.

It is an amenable number.

660784540 is an abundant number, since it is smaller than the sum of its proper divisors (833605700).

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

660784540 is a wasteful number, since it uses less digits than its factorization.

660784540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2541501 (or 2541499 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 660784540 is about 25705.7297114865. The cubic root of 660784540 is about 871.0036156609.

The spelling of 660784540 in words is "six hundred sixty million, seven hundred eighty-four thousand, five hundred forty".