6656761005 has 16 divisors (see below), whose sum is σ = 10704887424. Its totient is φ = 3532249280.

The previous prime is 6656760997. The next prime is 6656761019. The reversal of 6656761005 is 5001676566.

It is not a de Polignac number, because 6656761005 - 2³ = 6656760997 is a prime.

It is a super-2 number, since 2×6656761005² = 88624934155377220050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1123401 + ... + 1129310.

It is an arithmetic number, because the mean of its divisors is an integer number (669055464).

Almost surely, 2^6656761005 is an apocalyptic number.

It is an amenable number.

6656761005 is a deficient number, since it is larger than the sum of its proper divisors (4048126419).

6656761005 is a wasteful number, since it uses less digits than its factorization.

6656761005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2252916.

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 6656761005 is about 81588.9760016634. The cubic root of 6656761005 is about 1881.1394372464.

The spelling of 6656761005 in words is "six billion, six hundred fifty-six million, seven hundred sixty-one thousand, five".