1656710345 has 8 divisors (see below), whose sum is σ = 1988448264. Its totient is φ = 1325104384.

The previous prime is 1656710327. The next prime is 1656710353. The reversal of 1656710345 is 5430176561.

It can be written as a sum of positive squares in 4 ways, for example, as 1123054144 + 533656201 = 33512^2 + 23101^2 .

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 1656710345 - 2⁸ = 1656710089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1656710299 and 1656710308.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2864 + ... + 57633.

It is an arithmetic number, because the mean of its divisors is an integer number (248556033).

Almost surely, 2^1656710345 is an apocalyptic number.

It is an amenable number.

1656710345 is a deficient number, since it is larger than the sum of its proper divisors (331737919).

1656710345 is an equidigital number, since it uses as much as digits as its factorization.

1656710345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65979.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 1656710345 is about 40702.7068510191. The cubic root of 1656710345 is about 1183.2654797214.

The spelling of 1656710345 in words is "one billion, six hundred fifty-six million, seven hundred ten thousand, three hundred forty-five".