656616345 has 64 divisors (see below), whose sum is σ = 1378805760. Its totient is φ = 258508800.

The previous prime is 656616343. The next prime is 656616413. The reversal of 656616345 is 543616656.

656616345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 656616345 - 2¹ = 656616343 is a prime.

It is a super-2 number, since 2×656616345² = 862290049042318050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 656616297 and 656616306.

It is not an unprimeable number, because it can be changed into a prime (656616343) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6985 + ... + 36905.

It is an arithmetic number, because the mean of its divisors is an integer number (21543840).

Almost surely, 2^656616345 is an apocalyptic number.

It is an amenable number.

656616345 is an abundant number, since it is smaller than the sum of its proper divisors (722189415).

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

656616345 is a wasteful number, since it uses less digits than its factorization.

656616345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29966.

The product of its digits is 388800, while the sum is 42.

The square root of 656616345 is about 25624.5262395229. The cubic root of 656616345 is about 869.1683359004.

The spelling of 656616345 in words is "six hundred fifty-six million, six hundred sixteen thousand, three hundred forty-five".