6618855745 has 16 divisors (see below), whose sum is σ = 8259563520. Its totient is φ = 5085707200.

The previous prime is 6618855739. The next prime is 6618855767. The reversal of 6618855745 is 5475588166.

It is not a de Polignac number, because 6618855745 - 2²⁹ = 6081984833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91801 + ... + 147190.

It is an arithmetic number, because the mean of its divisors is an integer number (516222720).

Almost surely, 2^6618855745 is an apocalyptic number.

It is an amenable number.

6618855745 is a deficient number, since it is larger than the sum of its proper divisors (1640707775).

6618855745 is a wasteful number, since it uses less digits than its factorization.

6618855745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239216.

The product of its digits is 8064000, while the sum is 55.

The square root of 6618855745 is about 81356.3503667661. The cubic root of 6618855745 is about 1877.5620792202.

The spelling of 6618855745 in words is "six billion, six hundred eighteen million, eight hundred fifty-five thousand, seven hundred forty-five".