1663660250 has 96 divisors (see below), whose sum is σ = 3678727104. Its totient is φ = 561607200.

The previous prime is 1663660247. The next prime is 1663660253. The reversal of 1663660250 is 520663661.

It is an interprime number because it is at equal distance from previous prime (1663660247) and next prime (1663660253).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1663660250.

It is not an unprimeable number, because it can be changed into a prime (1663660253) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 819737 + ... + 821763.

It is an arithmetic number, because the mean of its divisors is an integer number (38320074).

Almost surely, 2^1663660250 is an apocalyptic number.

1663660250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1663660250 is an abundant number, since it is smaller than the sum of its proper divisors (2015066854).

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

1663660250 is a wasteful number, since it uses less digits than its factorization.

1663660250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125 (or 2108 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 1663660250 is about 40787.9914925950. The cubic root of 1663660250 is about 1184.9177721908.

The spelling of 1663660250 in words is "one billion, six hundred sixty-three million, six hundred sixty thousand, two hundred fifty".