1077766705521 has 12 divisors (see below), whose sum is σ = 1698299051280. Its totient is φ = 653191942680.

The previous prime is 1077766705481. The next prime is 1077766705577. The reversal of 1077766705521 is 1255076677701.

1077766705521 is a `hidden beast` number, since 10 + 7 + 7 + 7 + 6 + 6 + 70 + 552 + 1 = 666.

It is not a de Polignac number, because 1077766705521 - 2¹⁴ = 1077766689137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1077766705021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5443266091 + ... + 5443266288.

It is an arithmetic number, because the mean of its divisors is an integer number (141524920940).

Almost surely, 2^{1077766705521} is an apocalyptic number.

1077766705521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1077766705521 is a deficient number, since it is larger than the sum of its proper divisors (620532345759).

1077766705521 is a wasteful number, since it uses less digits than its factorization.

1077766705521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10886532396 (or 10886532393 counting only the distinct ones).

The product of its (nonzero) digits is 4321800, while the sum is 54.

The spelling of 1077766705521 in words is "one trillion, seventy-seven billion, seven hundred sixty-six million, seven hundred five thousand, five hundred twenty-one".