693044056661 has 4 divisors (see below), whose sum is σ = 756048061824. Its totient is φ = 630040051500.

The previous prime is 693044056543. The next prime is 693044056717. The reversal of 693044056661 is 166650440396.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 693044056661 - 2¹⁴ = 693044040277 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (693044056961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31502002565 + ... + 31502002586.

It is an arithmetic number, because the mean of its divisors is an integer number (189012015456).

Almost surely, 2^693044056661 is an apocalyptic number.

It is an amenable number.

693044056661 is a deficient number, since it is larger than the sum of its proper divisors (63004005163).

693044056661 is a wasteful number, since it uses less digits than its factorization.

693044056661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63004005162.

The product of its (nonzero) digits is 2799360, while the sum is 50.

The spelling of 693044056661 in words is "six hundred ninety-three billion, forty-four million, fifty-six thousand, six hundred sixty-one".