671622216799 has 4 divisors (see below), whose sum is σ = 671907167064. Its totient is φ = 671337266536.

The previous prime is 671622216703. The next prime is 671622216817. The reversal of 671622216799 is 997612226176.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671622216799 is a prime.

It is a super-3 number, since 3×671622216799³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671622216299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142471597 + ... + 142476310.

It is an arithmetic number, because the mean of its divisors is an integer number (167976791766).

Almost surely, 2^671622216799 is an apocalyptic number.

671622216799 is a deficient number, since it is larger than the sum of its proper divisors (284950265).

671622216799 is a wasteful number, since it uses less digits than its factorization.

671622216799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284950264.

The product of its digits is 6858432, while the sum is 58.

The spelling of 671622216799 in words is "six hundred seventy-one billion, six hundred twenty-two million, two hundred sixteen thousand, seven hundred ninety-nine".