6618634656 has 48 divisors (see below), whose sum is σ = 17378613504. Its totient is φ = 2205615104.

The previous prime is 6618634651. The next prime is 6618634657. The reversal of 6618634656 is 6564368166.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 6618634599 and 6618634608.

It is not an unprimeable number, because it can be changed into a prime (6618634651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481576 + ... + 495128.

It is an arithmetic number, because the mean of its divisors is an integer number (362054448).

Almost surely, 2^6618634656 is an apocalyptic number.

It is an amenable number.

6618634656 is an abundant number, since it is smaller than the sum of its proper divisors (10759978848).

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

6618634656 is a wasteful number, since it uses less digits than its factorization.

6618634656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18653 (or 18645 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 51.

The square root of 6618634656 is about 81354.9915862573. The cubic root of 6618634656 is about 1877.5411736458.

The spelling of 6618634656 in words is "six billion, six hundred eighteen million, six hundred thirty-four thousand, six hundred fifty-six".