77322221566 has 8 divisors (see below), whose sum is σ = 116080555824. Its totient is φ = 38628702960.

The previous prime is 77322221539. The next prime is 77322221569. The reversal of 77322221566 is 66512222377.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77322221569) 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, 16200930 + ... + 16205701.

It is an arithmetic number, because the mean of its divisors is an integer number (14510069478).

Almost surely, 2^77322221566 is an apocalyptic number.

77322221566 is a deficient number, since it is larger than the sum of its proper divisors (38758334258).

77322221566 is a wasteful number, since it uses less digits than its factorization.

77322221566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32407826.

The product of its digits is 423360, while the sum is 43.

The spelling of 77322221566 in words is "seventy-seven billion, three hundred twenty-two million, two hundred twenty-one thousand, five hundred sixty-six".