6561196676 has 6 divisors (see below), whose sum is σ = 11482094190. Its totient is φ = 3280598336.

The previous prime is 6561196651. The next prime is 6561196687. The reversal of 6561196676 is 6766911656.

It can be written as a sum of positive squares in only one way, i.e., 6150323776 + 410872900 = 78424^2 + 20270^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820149581 + ... + 820149588.

It is an arithmetic number, because the mean of its divisors is an integer number (1913682365).

Almost surely, 2^6561196676 is an apocalyptic number.

It is an amenable number.

6561196676 is a deficient number, since it is larger than the sum of its proper divisors (4920897514).

6561196676 is a wasteful number, since it uses less digits than its factorization.

6561196676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640299173 (or 1640299171 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 53.

The square root of 6561196676 is about 81001.2140402846. The cubic root of 6561196676 is about 1872.0941466671.

The spelling of 6561196676 in words is "six billion, five hundred sixty-one million, one hundred ninety-six thousand, six hundred seventy-six".