660465852 has 12 divisors (see below), whose sum is σ = 1541087016. Its totient is φ = 220155280.

The previous prime is 660465823. The next prime is 660465857. The reversal of 660465852 is 258564066.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660465857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27519399 + ... + 27519422.

It is an arithmetic number, because the mean of its divisors is an integer number (128423918).

Almost surely, 2^660465852 is an apocalyptic number.

It is an amenable number.

660465852 is an abundant number, since it is smaller than the sum of its proper divisors (880621164).

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

660465852 is a wasteful number, since it uses less digits than its factorization.

660465852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55038828 (or 55038826 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The square root of 660465852 is about 25699.5301902583. The cubic root of 660465852 is about 870.8635684798.

The spelling of 660465852 in words is "six hundred sixty million, four hundred sixty-five thousand, eight hundred fifty-two".