660856142 has 8 divisors (see below), whose sum is σ = 992140056. Its totient is φ = 330142792.

The previous prime is 660856129. The next prime is 660856177. The reversal of 660856142 is 241658066.

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

It is a junction number, because it is equal to n+sod(n) for n = 660856096 and 660856105.

It is a congruent number.

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, 139733 + ... + 144384.

It is an arithmetic number, because the mean of its divisors is an integer number (124017507).

Almost surely, 2^660856142 is an apocalyptic number.

660856142 is a deficient number, since it is larger than the sum of its proper divisors (331283914).

660856142 is a wasteful number, since it uses less digits than its factorization.

660856142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285282.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 660856142 is about 25707.1223982771. The cubic root of 660856142 is about 871.0350749060.

It can be divided in two parts, 66085 and 6142, that added together give a palindrome (72227).

The spelling of 660856142 in words is "six hundred sixty million, eight hundred fifty-six thousand, one hundred forty-two".