671600221505 has 8 divisors (see below), whose sum is σ = 823067505792. Its totient is φ = 525848683888.

The previous prime is 671600221471. The next prime is 671600221507. The reversal of 671600221505 is 505122006176.

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 671600221505 - 2⁸ = 671600221249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671600221507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1428936407 + ... + 1428936876.

It is an arithmetic number, because the mean of its divisors is an integer number (102883438224).

Almost surely, 2^671600221505 is an apocalyptic number.

It is an amenable number.

671600221505 is a deficient number, since it is larger than the sum of its proper divisors (151467284287).

671600221505 is a wasteful number, since it uses less digits than its factorization.

671600221505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857873335.

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 671600221505 in words is "six hundred seventy-one billion, six hundred million, two hundred twenty-one thousand, five hundred five".