122071665566 has 4 divisors (see below), whose sum is σ = 183107498352. Its totient is φ = 61035832782.

The previous prime is 122071665539. The next prime is 122071665619. The reversal of 122071665566 is 665566170221.

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

It is a self number, because there is not a number n which added to its sum of digits gives 122071665566.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 30517916390 + ... + 30517916393.

It is an arithmetic number, because the mean of its divisors is an integer number (45776874588).

Almost surely, 2^122071665566 is an apocalyptic number.

122071665566 is a deficient number, since it is larger than the sum of its proper divisors (61035832786).

122071665566 is an equidigital number, since it uses as much as digits as its factorization.

122071665566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61035832785.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 122071665566 in words is "one hundred twenty-two billion, seventy-one million, six hundred sixty-five thousand, five hundred sixty-six".