660684642606 has 48 divisors (see below), whose sum is σ = 1532388469248. Its totient is φ = 213124073400.

The previous prime is 660684642601. The next prime is 660684642617. The reversal of 660684642606 is 606246486066.

660684642606 is a `hidden beast` number, since 6 + 60 + 68 + 464 + 2 + 60 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660684642601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21911280 + ... + 21941411.

It is an arithmetic number, because the mean of its divisors is an integer number (31924759776).

Almost surely, 2^660684642606 is an apocalyptic number.

660684642606 is an abundant number, since it is smaller than the sum of its proper divisors (871703826642).

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

660684642606 is a wasteful number, since it uses less digits than its factorization.

660684642606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43852739 (or 43852727 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 54.

The spelling of 660684642606 in words is "six hundred sixty billion, six hundred eighty-four million, six hundred forty-two thousand, six hundred six".