656682242 has 4 divisors (see below), whose sum is σ = 985023366. Its totient is φ = 328341120.

The previous prime is 656682241. The next prime is 656682251. The reversal of 656682242 is 242286656.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 484836361 + 171845881 = 22019^2 + 13109^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 656682242.

It is not an unprimeable number, because it can be changed into a prime (656682241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164170559 + ... + 164170562.

Almost surely, 2^656682242 is an apocalyptic number.

656682242 is a deficient number, since it is larger than the sum of its proper divisors (328341124).

656682242 is a wasteful number, since it uses less digits than its factorization.

656682242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328341123.

The product of its digits is 276480, while the sum is 41.

The square root of 656682242 is about 25625.8120261583. The cubic root of 656682242 is about 869.1974110574.

The spelling of 656682242 in words is "six hundred fifty-six million, six hundred eighty-two thousand, two hundred forty-two".