8661948214765 has 8 divisors (see below), whose sum is σ = 10394448765048. Its totient is φ = 6929484633600.

The previous prime is 8661948214747. The next prime is 8661948214771. The reversal of 8661948214765 is 5674128491668.

It can be written as a sum of positive squares in 4 ways, for example, as 2639110717156 + 6022837497609 = 1624534^2 + 2454147^2 .

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

It is not a de Polignac number, because 8661948214765 - 2¹⁹ = 8661947690477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8661948214765.

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, 8724172 + ... + 9666181.

It is an arithmetic number, because the mean of its divisors is an integer number (1299306095631).

Almost surely, 2^{8661948214765} is an apocalyptic number.

It is an amenable number.

8661948214765 is a deficient number, since it is larger than the sum of its proper divisors (1732500550283).

8661948214765 is a wasteful number, since it uses less digits than its factorization.

8661948214765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18484559.

The product of its digits is 139345920, while the sum is 67.

The spelling of 8661948214765 in words is "eight trillion, six hundred sixty-one billion, nine hundred forty-eight million, two hundred fourteen thousand, seven hundred sixty-five".