66769413554 has 16 divisors (see below), whose sum is σ = 106053978456. Its totient is φ = 31418400000.

The previous prime is 66769413553. The next prime is 66769413589. The reversal of 66769413554 is 45531496766.

It can be written as a sum of positive squares in 4 ways, for example, as 61110312025 + 5659101529 = 247205^2 + 75227^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66769413554.

It is not an unprimeable number, because it can be changed into a prime (66769413551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397304 + ... + 539804.

Almost surely, 2^66769413554 is an apocalyptic number.

66769413554 is a deficient number, since it is larger than the sum of its proper divisors (39284564902).

66769413554 is a wasteful number, since it uses less digits than its factorization.

66769413554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156301.

The product of its digits is 16329600, while the sum is 56.

The spelling of 66769413554 in words is "sixty-six billion, seven hundred sixty-nine million, four hundred thirteen thousand, five hundred fifty-four".