656603331 has 8 divisors (see below), whose sum is σ = 878460240. Its totient is φ = 436240992.

The previous prime is 656603317. The next prime is 656603351. The reversal of 656603331 is 133306656.

656603331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 656603331 - 2⁷ = 656603203 is a prime.

It is a super-2 number, since 2×656603331² = 862255868560591122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 656603292 and 656603301.

It is not an unprimeable number, because it can be changed into a prime (656603351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372616 + ... + 374373.

It is an arithmetic number, because the mean of its divisors is an integer number (109807530).

Almost surely, 2^656603331 is an apocalyptic number.

656603331 is a deficient number, since it is larger than the sum of its proper divisors (221856909).

656603331 is a wasteful number, since it uses less digits than its factorization.

656603331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747285.

The product of its (nonzero) digits is 29160, while the sum is 33.

The square root of 656603331 is about 25624.2723018625. The cubic root of 656603331 is about 869.1625936170.

Adding to 656603331 its reverse (133306656), we get a palindrome (789909987).

The spelling of 656603331 in words is "six hundred fifty-six million, six hundred three thousand, three hundred thirty-one".