6651163398 has 64 divisors (see below), whose sum is σ = 15496427520. Its totient is φ = 1883212800.

The previous prime is 6651163381. The next prime is 6651163399. The reversal of 6651163398 is 8933611566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6651163399) 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, 3286 + ... + 115382.

It is an arithmetic number, because the mean of its divisors is an integer number (242131680).

Almost surely, 2^6651163398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6651163398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7748213760).

6651163398 is an abundant number, since it is smaller than the sum of its proper divisors (8845264122).

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

6651163398 is a wasteful number, since it uses less digits than its factorization.

6651163398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112173.

The product of its digits is 699840, while the sum is 48.

The square root of 6651163398 is about 81554.6650903552. The cubic root of 6651163398 is about 1880.6120119643.

The spelling of 6651163398 in words is "six billion, six hundred fifty-one million, one hundred sixty-three thousand, three hundred ninety-eight".