663415698 has 64 divisors (see below), whose sum is σ = 1493002368. Its totient is φ = 194757120.

The previous prime is 663415679. The next prime is 663415699. The reversal of 663415698 is 896514366.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (663415699) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 773686 + ... + 774542.

It is an arithmetic number, because the mean of its divisors is an integer number (23328162).

Almost surely, 2^663415698 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663415698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (746501184).

663415698 is an abundant number, since it is smaller than the sum of its proper divisors (829586670).

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

663415698 is a wasteful number, since it uses less digits than its factorization.

663415698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227.

The product of its digits is 933120, while the sum is 48.

The square root of 663415698 is about 25756.8573005326. The cubic root of 663415698 is about 872.1581589297.

The spelling of 663415698 in words is "six hundred sixty-three million, four hundred fifteen thousand, six hundred ninety-eight".