6615497196 has 144 divisors (see below), whose sum is σ = 21334080768. Its totient is φ = 1678320000.

The previous prime is 6615497191. The next prime is 6615497219. The reversal of 6615497196 is 6917945166.

It is a happy number.

6615497196 is a `hidden beast` number, since 6 + 6 + 1 + 549 + 7 + 1 + 96 = 666.

It is not an unprimeable number, because it can be changed into a prime (6615497191) 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, 91446 + ... + 146946.

Almost surely, 2^6615497196 is an apocalyptic number.

6615497196 is a gapful number since it is divisible by the number (66) 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 6615497196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10667040384).

6615497196 is an abundant number, since it is smaller than the sum of its proper divisors (14718583572).

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

6615497196 is a wasteful number, since it uses less digits than its factorization.

6615497196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55572 (or 55567 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 6615497196 is about 81335.7067713806. The cubic root of 6615497196 is about 1877.2444537692.

The spelling of 6615497196 in words is "six billion, six hundred fifteen million, four hundred ninety-seven thousand, one hundred ninety-six".