6656661004 has 12 divisors (see below), whose sum is σ = 13313322064. Its totient is φ = 2852854704.

The previous prime is 6656660999. The next prime is 6656661023. The reversal of 6656661004 is 4001666566.

6656661004 is an admirable number.

It is a super-2 number, since 2×6656661004² = 88622271444348576032, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118868919 + ... + 118868974.

Almost surely, 2^6656661004 is an apocalyptic number.

It is an amenable number.

6656661004 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.

6656661004 is a wasteful number, since it uses less digits than its factorization.

6656661004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237737904 (or 237737902 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 6656661004 is about 81588.3631653436. The cubic root of 6656661004 is about 1881.1300174116.

The spelling of 6656661004 in words is "six billion, six hundred fifty-six million, six hundred sixty-one thousand, four".