8193364606661 has 4 divisors (see below), whose sum is σ = 8823623422572. Its totient is φ = 7563105790752.

The previous prime is 8193364606649. The next prime is 8193364606663. The reversal of 8193364606661 is 1666064633918.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3014581425025 + 5178783181636 = 1736255^2 + 2275694^2 .

It is a cyclic number.

It is not a de Polignac number, because 8193364606661 - 2²² = 8193360412357 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 8193364606661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8193364606663) 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, 315129407936 + ... + 315129407961.

It is an arithmetic number, because the mean of its divisors is an integer number (2205905855643).

Almost surely, 2^{8193364606661} is an apocalyptic number.

It is an amenable number.

8193364606661 is a deficient number, since it is larger than the sum of its proper divisors (630258815911).

8193364606661 is a wasteful number, since it uses less digits than its factorization.

8193364606661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630258815910.

The product of its (nonzero) digits is 20155392, while the sum is 59.

The spelling of 8193364606661 in words is "eight trillion, one hundred ninety-three billion, three hundred sixty-four million, six hundred six thousand, six hundred sixty-one".