6613749053 has 4 divisors (see below), whose sum is σ = 6615401148. Its totient is φ = 6612096960.

The previous prime is 6613749029. The next prime is 6613749059. The reversal of 6613749053 is 3509473166.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5035037764 + 1578711289 = 70958^2 + 39733^2 .

It is a cyclic number.

It is not a de Polignac number, because 6613749053 - 2³⁰ = 5540007229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6613748995 and 6613749013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6613749059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 820028 + ... + 828053.

It is an arithmetic number, because the mean of its divisors is an integer number (1653850287).

Almost surely, 2^6613749053 is an apocalyptic number.

It is an amenable number.

6613749053 is a deficient number, since it is larger than the sum of its proper divisors (1652095).

6613749053 is a wasteful number, since it uses less digits than its factorization.

6613749053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652094.

The product of its (nonzero) digits is 408240, while the sum is 44.

The square root of 6613749053 is about 81324.9595942107. The cubic root of 6613749053 is about 1877.0790854550.

The spelling of 6613749053 in words is "six billion, six hundred thirteen million, seven hundred forty-nine thousand, fifty-three".