660874442 has 8 divisors (see below), whose sum is σ = 991435296. Its totient is φ = 330396012.

The previous prime is 660874393. The next prime is 660874447. The reversal of 660874442 is 244478066.

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

It is a super-2 number, since 2×660874442² = 873510056177622728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 660874442.

It is not an unprimeable number, because it can be changed into a prime (660874447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6653 + ... + 36959.

It is an arithmetic number, because the mean of its divisors is an integer number (123929412).

Almost surely, 2^660874442 is an apocalyptic number.

660874442 is a deficient number, since it is larger than the sum of its proper divisors (330560854).

660874442 is a wasteful number, since it uses less digits than its factorization.

660874442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41212.

The product of its (nonzero) digits is 258048, while the sum is 41.

The square root of 660874442 is about 25707.4783282997. The cubic root of 660874442 is about 871.0431148781.

The spelling of 660874442 in words is "six hundred sixty million, eight hundred seventy-four thousand, four hundred forty-two".