245659665 has 48 divisors (see below), whose sum is σ = 416953152. Its totient is φ = 123480192.

The previous prime is 245659643. The next prime is 245659681. The reversal of 245659665 is 566956542.

It is not a de Polignac number, because 245659665 - 2⁵ = 245659633 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 658419 + ... + 658791.

It is an arithmetic number, because the mean of its divisors is an integer number (8686524).

Almost surely, 2^245659665 is an apocalyptic number.

It is an amenable number.

245659665 is a deficient number, since it is larger than the sum of its proper divisors (171293487).

245659665 is a wasteful number, since it uses less digits than its factorization.

245659665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510 (or 487 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 48.

The square root of 245659665 is about 15673.5339027291. The cubic root of 245659665 is about 626.2935683092.

The spelling of 245659665 in words is "two hundred forty-five million, six hundred fifty-nine thousand, six hundred sixty-five".