1663197120 has 336 divisors, whose sum is σ = 6363931392. Its totient is φ = 395919360.

The previous prime is 1663197073. The next prime is 1663197121. The reversal of 1663197120 is 217913661.

1663197120 is a `hidden beast` number, since 1 + 6 + 631 + 9 + 7 + 12 + 0 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663197121) 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, 1159924 + ... + 1161356.

It is an arithmetic number, because the mean of its divisors is an integer number (18940272).

Almost surely, 2^1663197120 is an apocalyptic number.

1663197120 is a gapful number since it is divisible by the number (10) 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 1663197120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3181965696).

1663197120 is an abundant number, since it is smaller than the sum of its proper divisors (4700734272).

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

1663197120 is a wasteful number, since it uses less digits than its factorization.

1663197120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500 (or 1487 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 1663197120 is about 40782.3138137110. The cubic root of 1663197120 is about 1184.8078094549.

The spelling of 1663197120 in words is "one billion, six hundred sixty-three million, one hundred ninety-seven thousand, one hundred twenty".