6556011664777 has 2 divisors, whose sum is σ = 6556011664778. Its totient is φ = 6556011664776.

The previous prime is 6556011664751. The next prime is 6556011664907. The reversal of 6556011664777 is 7774661106556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6300647191881 + 255364472896 = 2510109^2 + 505336^2 .

It is a cyclic number.

It is not a de Polignac number, because 6556011664777 - 2³¹ = 6553864181129 is a prime.

It is a super-4 number, since 4×6556011664777⁴ (a number of 52 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (6556011664577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3278005832388 + 3278005832389.

It is an arithmetic number, because the mean of its divisors is an integer number (3278005832389).

Almost surely, 2^{6556011664777} is an apocalyptic number.

It is an amenable number.

6556011664777 is a deficient number, since it is larger than the sum of its proper divisors (1).

6556011664777 is an equidigital number, since it uses as much as digits as its factorization.

6556011664777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44452800, while the sum is 61.

The spelling of 6556011664777 in words is "six trillion, five hundred fifty-six billion, eleven million, six hundred sixty-four thousand, seven hundred seventy-seven".