1663239676 has 48 divisors (see below), whose sum is σ = 3534886656. Its totient is φ = 668461824.

The previous prime is 1663239671. The next prime is 1663239701. The reversal of 1663239676 is 6769323661.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663239671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128535 + ... + 140881.

It is an arithmetic number, because the mean of its divisors is an integer number (73643472).

Almost surely, 2^1663239676 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1663239676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1767443328).

1663239676 is an abundant number, since it is smaller than the sum of its proper divisors (1871646980).

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

1663239676 is a wasteful number, since it uses less digits than its factorization.

1663239676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12658 (or 12656 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 49.

The square root of 1663239676 is about 40782.8355561503. The cubic root of 1663239676 is about 1184.8179145411.

The spelling of 1663239676 in words is "one billion, six hundred sixty-three million, two hundred thirty-nine thousand, six hundred seventy-six".