6656507838 has 12 divisors (see below), whose sum is σ = 14422433688. Its totient is φ = 2218835940.

The previous prime is 6656507831. The next prime is 6656507839. The reversal of 6656507838 is 8387056566.

6656507838 is a `hidden beast` number, since 6 + 6 + 56 + 507 + 83 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6656507831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 184902978 + ... + 184903013.

It is an arithmetic number, because the mean of its divisors is an integer number (1201869474).

Almost surely, 2^6656507838 is an apocalyptic number.

6656507838 is an abundant number, since it is smaller than the sum of its proper divisors (7765925850).

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

6656507838 is a wasteful number, since it uses less digits than its factorization.

6656507838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369805999 (or 369805996 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The square root of 6656507838 is about 81587.4245089278. The cubic root of 6656507838 is about 1881.1155893888.

The spelling of 6656507838 in words is "six billion, six hundred fifty-six million, five hundred seven thousand, eight hundred thirty-eight".