611606665613 has 8 divisors (see below), whose sum is σ = 624819985920. Its totient is φ = 598401695920.

The previous prime is 611606665603. The next prime is 611606665639. The reversal of 611606665613 is 316566606116.

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

It is a cyclic number.

It is not a de Polignac number, because 611606665613 - 2¹⁰ = 611606664589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611606665603) 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 7 ways as a sum of consecutive naturals, for example, 1939478 + ... + 2232663.

It is an arithmetic number, because the mean of its divisors is an integer number (78102498240).

Almost surely, 2^611606665613 is an apocalyptic number.

It is an amenable number.

611606665613 is a deficient number, since it is larger than the sum of its proper divisors (13213320307).

611606665613 is a wasteful number, since it uses less digits than its factorization.

611606665613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4175307.

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 611606665613 in words is "six hundred eleven billion, six hundred six million, six hundred sixty-five thousand, six hundred thirteen".