660743242 has 16 divisors (see below), whose sum is σ = 1018321920. Its totient is φ = 321418368.

The previous prime is 660743197. The next prime is 660743243. The reversal of 660743242 is 242347066.

It is a junction number, because it is equal to n+sod(n) for n = 660743198 and 660743207.

It is not an unprimeable number, because it can be changed into a prime (660743243) 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, 17418 + ... + 40309.

It is an arithmetic number, because the mean of its divisors is an integer number (63645120).

Almost surely, 2^660743242 is an apocalyptic number.

660743242 is a deficient number, since it is larger than the sum of its proper divisors (357578678).

660743242 is a wasteful number, since it uses less digits than its factorization.

660743242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57885.

The product of its (nonzero) digits is 48384, while the sum is 34.

The square root of 660743242 is about 25704.9264149890. The cubic root of 660743242 is about 870.9854698284.

The spelling of 660743242 in words is "six hundred sixty million, seven hundred forty-three thousand, two hundred forty-two".