6656428618 has 48 divisors (see below), whose sum is σ = 11756876544. Its totient is φ = 2818082400.

The previous prime is 6656428613. The next prime is 6656428619. The reversal of 6656428618 is 8168246566.

It is a super-3 number, since 3×6656428618³ (a number of 30 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6656428613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2830143 + ... + 2832493.

It is an arithmetic number, because the mean of its divisors is an integer number (244934928).

Almost surely, 2^6656428618 is an apocalyptic number.

6656428618 is a deficient number, since it is larger than the sum of its proper divisors (5100447926).

6656428618 is a wasteful number, since it uses less digits than its factorization.

6656428618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2707 (or 2700 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 52.

The square root of 6656428618 is about 81586.9390159969. The cubic root of 6656428618 is about 1881.1081268889.

The spelling of 6656428618 in words is "six billion, six hundred fifty-six million, four hundred twenty-eight thousand, six hundred eighteen".