1663720230 has 64 divisors (see below), whose sum is σ = 4027742208. Its totient is φ = 439810560.

The previous prime is 1663720213. The next prime is 1663720259. The reversal of 1663720230 is 320273661.

It is a super-2 number, since 2×1663720230² = 5535930007422505800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2740587 + ... + 2741193.

It is an arithmetic number, because the mean of its divisors is an integer number (62933472).

Almost surely, 2^1663720230 is an apocalyptic number.

1663720230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1663720230 is an abundant number, since it is smaller than the sum of its proper divisors (2364021978).

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

1663720230 is a wasteful number, since it uses less digits than its factorization.

1663720230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 1663720230 is about 40788.7267513954. The cubic root of 1663720230 is about 1184.9320119800.

Adding to 1663720230 its reverse (320273661), we get a palindrome (1983993891).

The spelling of 1663720230 in words is "one billion, six hundred sixty-three million, seven hundred twenty thousand, two hundred thirty".