775903921066 has 8 divisors (see below), whose sum is σ = 1164468120804. Its totient is φ = 387747880800.

The previous prime is 775903921061. The next prime is 775903921069. The reversal of 775903921066 is 660129309577.

It can be written as a sum of positive squares in 2 ways, for example, as 692515230625 + 83388690441 = 832175^2 + 288771^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 775903920998 and 775903921016.

It is not an unprimeable number, because it can be changed into a prime (775903921061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102035115 + ... + 102042718.

Almost surely, 2^775903921066 is an apocalyptic number.

775903921066 is a deficient number, since it is larger than the sum of its proper divisors (388564199738).

775903921066 is a wasteful number, since it uses less digits than its factorization.

775903921066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204079736.

The product of its (nonzero) digits is 4286520, while the sum is 55.

The spelling of 775903921066 in words is "seven hundred seventy-five billion, nine hundred three million, nine hundred twenty-one thousand, sixty-six".