660520602 has 64 divisors (see below), whose sum is σ = 1690444800. Its totient is φ = 187265520.

The previous prime is 660520589. The next prime is 660520603. The reversal of 660520602 is 206025066.

660520602 is a `hidden beast` number, since 6 + 6 + 0 + 52 + 0 + 602 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (660520603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42849 + ... + 56187.

It is an arithmetic number, because the mean of its divisors is an integer number (26413200).

Almost surely, 2^660520602 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660520602, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (845222400).

660520602 is an abundant number, since it is smaller than the sum of its proper divisors (1029924198).

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

660520602 is a wasteful number, since it uses less digits than its factorization.

660520602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13488 (or 13482 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 660520602 is about 25700.5953627538. The cubic root of 660520602 is about 870.8876315270.

Adding to 660520602 its reverse (206025066), we get a palindrome (866545668).

The spelling of 660520602 in words is "six hundred sixty million, five hundred twenty thousand, six hundred two".