6656475642 has 8 divisors (see below), whose sum is σ = 13312951296. Its totient is φ = 2218825212.

The previous prime is 6656475619. The next prime is 6656475643. The reversal of 6656475642 is 2465746566.

It is a sphenic number, since it is the product of 3 distinct primes.

6656475642 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (6656475643) 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, 554706298 + ... + 554706309.

It is an arithmetic number, because the mean of its divisors is an integer number (1664118912).

Almost surely, 2^6656475642 is an apocalyptic number.

6656475642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6656475642 is a wasteful number, since it uses less digits than its factorization.

6656475642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109412612.

The product of its digits is 7257600, while the sum is 51.

The square root of 6656475642 is about 81587.2271988698. The cubic root of 6656475642 is about 1881.1125565426.

The spelling of 6656475642 in words is "six billion, six hundred fifty-six million, four hundred seventy-five thousand, six hundred forty-two".