611666797611611 has 16 divisors (see below), whose sum is σ = 726785739886080. Its totient is φ = 503864063334720.

The previous prime is 611666797611589. The next prime is 611666797611641. The reversal of 611666797611611 is 116116797666116.

It is a cyclic number.

It is not a de Polignac number, because 611666797611611 - 2¹⁸ = 611666797349467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (611666797611641) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 15904780751 + ... + 15904819208.

It is an arithmetic number, because the mean of its divisors is an integer number (45424108742880).

Almost surely, 2^{611666797611611} is an apocalyptic number.

611666797611611 is a deficient number, since it is larger than the sum of its proper divisors (115118942274469).

611666797611611 is a wasteful number, since it uses less digits than its factorization.

611666797611611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31809600074.

The product of its digits is 20575296, while the sum is 65.

The spelling of 611666797611611 in words is "six hundred eleven trillion, six hundred sixty-six billion, seven hundred ninety-seven million, six hundred eleven thousand, six hundred eleven".