245666520 has 320 divisors, whose sum is σ = 923646240. Its totient is φ = 58060800.

The previous prime is 245666503. The next prime is 245666567. The reversal of 245666520 is 25666542.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2173984 + ... + 2174096.

Almost surely, 2^245666520 is an apocalyptic number.

245666520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245666520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (461823120).

245666520 is an abundant number, since it is smaller than the sum of its proper divisors (677979720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245666520 is a wasteful number, since it uses less digits than its factorization.

245666520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 245666520 is about 15673.7525819441. The cubic root of 245666520 is about 626.2993937161.

The spelling of 245666520 in words is "two hundred forty-five million, six hundred sixty-six thousand, five hundred twenty".