660042426 has 8 divisors (see below), whose sum is σ = 1320084864. Its totient is φ = 220014140.

The previous prime is 660042403. The next prime is 660042433. The reversal of 660042426 is 624240066.

It is a sphenic number, since it is the product of 3 distinct primes.

660042426 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 660042393 and 660042402.

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, 55003530 + ... + 55003541.

It is an arithmetic number, because the mean of its divisors is an integer number (165010608).

Almost surely, 2^660042426 is an apocalyptic number.

660042426 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

660042426 is a wasteful number, since it uses less digits than its factorization.

660042426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110007076.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 660042426 is about 25691.2908589662. The cubic root of 660042426 is about 870.6774245605.

The spelling of 660042426 in words is "six hundred sixty million, forty-two thousand, four hundred twenty-six".