245666523 has 8 divisors (see below), whose sum is σ = 344795200. Its totient is φ = 155157768.

The previous prime is 245666503. The next prime is 245666567. The reversal of 245666523 is 325666542.

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

It is not a de Polignac number, because 245666523 - 2¹⁰ = 245665499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245666503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2154913 + ... + 2155026.

It is an arithmetic number, because the mean of its divisors is an integer number (43099400).

Almost surely, 2^245666523 is an apocalyptic number.

245666523 is a deficient number, since it is larger than the sum of its proper divisors (99128677).

245666523 is a wasteful number, since it uses less digits than its factorization.

245666523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4309961.

The product of its digits is 259200, while the sum is 39.

The square root of 245666523 is about 15673.7526776455. The cubic root of 245666523 is about 626.2993962655.

The spelling of 245666523 in words is "two hundred forty-five million, six hundred sixty-six thousand, five hundred twenty-three".