7772661106556 has 6 divisors (see below), whose sum is σ = 13602156936480. Its totient is φ = 3886330553276.

The previous prime is 7772661106453. The next prime is 7772661106699. The reversal of 7772661106556 is 6556011662777.

It is a super-2 number, since 2×7772661106556² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7772661106495 and 7772661106504.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 971582638316 + ... + 971582638323.

It is an arithmetic number, because the mean of its divisors is an integer number (2267026156080).

Almost surely, 2^{7772661106556} is an apocalyptic number.

It is an amenable number.

7772661106556 is a deficient number, since it is larger than the sum of its proper divisors (5829495829924).

7772661106556 is a wasteful number, since it uses less digits than its factorization.

7772661106556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943165276643 (or 1943165276641 counting only the distinct ones).

The product of its (nonzero) digits is 22226400, while the sum is 59.

The spelling of 7772661106556 in words is "seven trillion, seven hundred seventy-two billion, six hundred sixty-one million, one hundred six thousand, five hundred fifty-six".