245666620 has 24 divisors (see below), whose sum is σ = 518162400. Its totient is φ = 97835712.

The previous prime is 245666593. The next prime is 245666621. The reversal of 245666620 is 26666542.

It is a happy number.

245666620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 245666620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245666621) 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, 22240 + ... + 31399.

It is an arithmetic number, because the mean of its divisors is an integer number (21590100).

Almost surely, 2^245666620 is an apocalyptic number.

245666620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245666620 is an abundant number, since it is smaller than the sum of its proper divisors (272495780).

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

245666620 is a wasteful number, since it uses less digits than its factorization.

245666620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53877 (or 53875 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 245666620 is about 15673.7557719903. The cubic root of 245666620 is about 626.2994786957.

The spelling of 245666620 in words is "two hundred forty-five million, six hundred sixty-six thousand, six hundred twenty".