662712571845666 has 32 divisors (see below), whose sum is σ = 1504028531854080. Its totient is φ = 216204101452368.

The previous prime is 662712571845593. The next prime is 662712571845691. The reversal of 662712571845666 is 666548175217266.

It is a super-3 number, since 3×662712571845666³ (a number of 45 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 662712571845594 and 662712571845603.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130558029741 + ... + 130558034816.

It is an arithmetic number, because the mean of its divisors is an integer number (47000891620440).

Almost surely, 2^{662712571845666} is an apocalyptic number.

662712571845666 is an abundant number, since it is smaller than the sum of its proper divisors (841315960008414).

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

662712571845666 is a wasteful number, since it uses less digits than its factorization.

662712571845666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261116064615 (or 261116064609 counting only the distinct ones).

The product of its digits is 1219276800, while the sum is 72.

The spelling of 662712571845666 in words is "six hundred sixty-two trillion, seven hundred twelve billion, five hundred seventy-one million, eight hundred forty-five thousand, six hundred sixty-six".