245216665 has 8 divisors (see below), whose sum is σ = 303752448. Its totient is φ = 189845040.

The previous prime is 245216651. The next prime is 245216683. The reversal of 245216665 is 566612542.

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

It is a de Polignac number, because none of the positive numbers 2^k-245216665 is a prime.

It is a Duffinian number.

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, 790867 + ... + 791176.

It is an arithmetic number, because the mean of its divisors is an integer number (37969056).

Almost surely, 2^245216665 is an apocalyptic number.

It is an amenable number.

245216665 is a deficient number, since it is larger than the sum of its proper divisors (58535783).

245216665 is a wasteful number, since it uses less digits than its factorization.

245216665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582079.

The product of its digits is 86400, while the sum is 37.

The square root of 245216665 is about 15659.3954225570. The cubic root of 245216665 is about 625.9168750864.

The spelling of 245216665 in words is "two hundred forty-five million, two hundred sixteen thousand, six hundred sixty-five".