616711662661 has 4 divisors (see below), whose sum is σ = 617018333824. Its totient is φ = 616404991500.

The previous prime is 616711662653. The next prime is 616711662701. The reversal of 616711662661 is 166266117616.

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 616711662661 - 2³ = 616711662653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616711662461) 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 3 ways as a sum of consecutive naturals, for example, 153332565 + ... + 153336586.

It is an arithmetic number, because the mean of its divisors is an integer number (154254583456).

Almost surely, 2^616711662661 is an apocalyptic number.

It is an amenable number.

616711662661 is a deficient number, since it is larger than the sum of its proper divisors (306671163).

616711662661 is a wasteful number, since it uses less digits than its factorization.

616711662661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306671162.

The product of its digits is 653184, while the sum is 49.

The spelling of 616711662661 in words is "six hundred sixteen billion, seven hundred eleven million, six hundred sixty-two thousand, six hundred sixty-one".