671311206233669 has 4 divisors (see below), whose sum is σ = 671353076841996. Its totient is φ = 671269335625344.

The previous prime is 671311206233653. The next prime is 671311206233671. The reversal of 671311206233669 is 966332602113176.

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

It can be written as a sum of positive squares in 2 ways, for example, as 353927539213444 + 317383667020225 = 18812962^2 + 17815265^2 .

It is a cyclic number.

It is not a de Polignac number, because 671311206233669 - 2⁴ = 671311206233653 is a prime.

It is a super-3 number, since 3×671311206233669³ (a number of 45 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671311206232669) 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, 20935280114 + ... + 20935312179.

It is an arithmetic number, because the mean of its divisors is an integer number (167838269210499).

Almost surely, 2^{671311206233669} is an apocalyptic number.

It is an amenable number.

671311206233669 is a deficient number, since it is larger than the sum of its proper divisors (41870608327).

671311206233669 is a wasteful number, since it uses less digits than its factorization.

671311206233669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41870608326.

The product of its (nonzero) digits is 8817984, while the sum is 56.

The spelling of 671311206233669 in words is "six hundred seventy-one trillion, three hundred eleven billion, two hundred six million, two hundred thirty-three thousand, six hundred sixty-nine".