6616415653 has 4 divisors (see below), whose sum is σ = 6829848448. Its totient is φ = 6402982860.

The previous prime is 6616415609. The next prime is 6616415671. The reversal of 6616415653 is 3565146166.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3565146166 = 2 ⋅1782573083.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6616415653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6616415683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106716351 + ... + 106716412.

It is an arithmetic number, because the mean of its divisors is an integer number (1707462112).

Almost surely, 2^6616415653 is an apocalyptic number.

It is an amenable number.

6616415653 is a deficient number, since it is larger than the sum of its proper divisors (213432795).

6616415653 is a wasteful number, since it uses less digits than its factorization.

6616415653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213432794.

The product of its digits is 388800, while the sum is 43.

The square root of 6616415653 is about 81341.3526627139. The cubic root of 6616415653 is about 1877.3313249684.

The spelling of 6616415653 in words is "six billion, six hundred sixteen million, four hundred fifteen thousand, six hundred fifty-three".