662605212656 has 20 divisors (see below), whose sum is σ = 1311112443552. Its totient is φ = 324253614336.

The previous prime is 662605212653. The next prime is 662605212671. The reversal of 662605212656 is 656212506266.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a self number, because there is not a number n which added to its sum of digits gives 662605212656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662605212653) 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 3 ways as a sum of consecutive naturals, for example, 440561225 + ... + 440562728.

Almost surely, 2^662605212656 is an apocalyptic number.

It is an amenable number.

662605212656 is a deficient number, since it is larger than the sum of its proper divisors (648507230896).

662605212656 is a wasteful number, since it uses less digits than its factorization.

662605212656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881124008 (or 881124002 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 662605212656 in words is "six hundred sixty-two billion, six hundred five million, two hundred twelve thousand, six hundred fifty-six".