671622216558 has 16 divisors (see below), whose sum is σ = 1343501477760. Its totient is φ = 223831231416.

The previous prime is 671622216523. The next prime is 671622216571. The reversal of 671622216558 is 855612226176.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 671622216558.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10676218 + ... + 10738941.

It is an arithmetic number, because the mean of its divisors is an integer number (83968842360).

Almost surely, 2^671622216558 is an apocalyptic number.

671622216558 is an abundant number, since it is smaller than the sum of its proper divisors (671879261202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671622216558 is a wasteful number, since it uses less digits than its factorization.

671622216558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21420391.

The product of its digits is 2419200, while the sum is 51.

The spelling of 671622216558 in words is "six hundred seventy-one billion, six hundred twenty-two million, two hundred sixteen thousand, five hundred fifty-eight".