617665345 has 64 divisors (see below), whose sum is σ = 886464000. Its totient is φ = 408432640.

The previous prime is 617665327. The next prime is 617665351. The reversal of 617665345 is 543566716.

It is not a de Polignac number, because 617665345 - 2¹⁷ = 617534273 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4145331 + ... + 4145479.

It is an arithmetic number, because the mean of its divisors is an integer number (13851000).

Almost surely, 2^617665345 is an apocalyptic number.

It is an amenable number.

617665345 is a deficient number, since it is larger than the sum of its proper divisors (268798655).

617665345 is a wasteful number, since it uses less digits than its factorization.

617665345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330.

The product of its digits is 453600, while the sum is 43.

The square root of 617665345 is about 24852.8739786770. The cubic root of 617665345 is about 851.6302484460.

The spelling of 617665345 in words is "six hundred seventeen million, six hundred sixty-five thousand, three hundred forty-five".