656328801 has 8 divisors (see below), whose sum is σ = 875453184. Its totient is φ = 437378480.

The previous prime is 656328787. The next prime is 656328811. The reversal of 656328801 is 108823656.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 656328801 - 2⁹ = 656328289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 656328801.

It is not an unprimeable number, because it can be changed into a prime (656328811) 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, 34446 + ... + 49991.

It is an arithmetic number, because the mean of its divisors is an integer number (109431648).

Almost surely, 2^656328801 is an apocalyptic number.

It is an amenable number.

656328801 is a deficient number, since it is larger than the sum of its proper divisors (219124383).

656328801 is a wasteful number, since it uses less digits than its factorization.

656328801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87031.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 656328801 is about 25618.9149067637. The cubic root of 656328801 is about 869.0414426074.

The spelling of 656328801 in words is "six hundred fifty-six million, three hundred twenty-eight thousand, eight hundred one".