1438636666966 has 16 divisors (see below), whose sum is σ = 2271565479600. Its totient is φ = 681449303808.

The previous prime is 1438636666933. The next prime is 1438636666993. The reversal of 1438636666966 is 6696666368341.

It is a junction number, because it is equal to n+sod(n) for n = 1438636666895 and 1438636666904.

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 in 7 ways as a sum of consecutive naturals, for example, 2708526 + ... + 3195838.

It is an arithmetic number, because the mean of its divisors is an integer number (141972842475).

Almost surely, 2^{1438636666966} is an apocalyptic number.

1438636666966 is a deficient number, since it is larger than the sum of its proper divisors (832928812634).

1438636666966 is a wasteful number, since it uses less digits than its factorization.

1438636666966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565023.

The product of its digits is 725594112, while the sum is 70.

The spelling of 1438636666966 in words is "one trillion, four hundred thirty-eight billion, six hundred thirty-six million, six hundred sixty-six thousand, nine hundred sixty-six".