6613921749 has 16 divisors (see below), whose sum is σ = 8840059200. Its totient is φ = 4398549120.

The previous prime is 6613921697. The next prime is 6613921763. The reversal of 6613921749 is 9471293166.

It is not a de Polignac number, because 6613921749 - 2⁸ = 6613921493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6613921698 and 6613921707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6613921789) 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, 3842209 + ... + 3843929.

It is an arithmetic number, because the mean of its divisors is an integer number (552503700).

Almost surely, 2^6613921749 is an apocalyptic number.

It is an amenable number.

6613921749 is a deficient number, since it is larger than the sum of its proper divisors (2226137451).

6613921749 is a wasteful number, since it uses less digits than its factorization.

6613921749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4100.

The product of its digits is 489888, while the sum is 48.

The square root of 6613921749 is about 81326.0213523322. The cubic root of 6613921749 is about 1877.0954231996.

The spelling of 6613921749 in words is "six billion, six hundred thirteen million, nine hundred twenty-one thousand, seven hundred forty-nine".