660689448 has 32 divisors (see below), whose sum is σ = 1657618560. Its totient is φ = 219443840.

The previous prime is 660689443. The next prime is 660689531. The reversal of 660689448 is 844986066.

It is a super-3 number, since 3×660689448³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 660689448.

It is not an unprimeable number, because it can be changed into a prime (660689443) 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, 42240 + ... + 55727.

It is an arithmetic number, because the mean of its divisors is an integer number (51800580).

Almost surely, 2^660689448 is an apocalyptic number.

It is an amenable number.

660689448 is an abundant number, since it is smaller than the sum of its proper divisors (996929112).

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

660689448 is a wasteful number, since it uses less digits than its factorization.

660689448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98257 (or 98253 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 51.

The square root of 660689448 is about 25703.8800183941. The cubic root of 660689448 is about 870.9618322735.

The spelling of 660689448 in words is "six hundred sixty million, six hundred eighty-nine thousand, four hundred forty-eight".