6656252642 has 16 divisors (see below), whose sum is σ = 10851058680. Its totient is φ = 3043930752.

The previous prime is 6656252621. The next prime is 6656252657. The reversal of 6656252642 is 2462526566.

It can be written as a sum of positive squares in 4 ways, for example, as 3012802321 + 3643450321 = 54889^2 + 60361^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 6656252593 and 6656252602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1171523 + ... + 1177190.

Almost surely, 2^6656252642 is an apocalyptic number.

6656252642 is a deficient number, since it is larger than the sum of its proper divisors (4194806038).

6656252642 is a wasteful number, since it uses less digits than its factorization.

6656252642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348837.

The product of its digits is 1036800, while the sum is 44.

The square root of 6656252642 is about 81585.8605519363. The cubic root of 6656252642 is about 1881.0915497913.

The spelling of 6656252642 in words is "six billion, six hundred fifty-six million, two hundred fifty-two thousand, six hundred forty-two".