667214537671 has 16 divisors (see below), whose sum is σ = 743401451520. Its totient is φ = 593617675680.

The previous prime is 667214537653. The next prime is 667214537681. The reversal of 667214537671 is 176735412766.

It is a cyclic number.

It is not a de Polignac number, because 667214537671 - 2¹³ = 667214529479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667214537611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12648970 + ... + 12701608.

It is an arithmetic number, because the mean of its divisors is an integer number (46462590720).

Almost surely, 2^667214537671 is an apocalyptic number.

667214537671 is a deficient number, since it is larger than the sum of its proper divisors (76186913849).

667214537671 is a wasteful number, since it uses less digits than its factorization.

667214537671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77214.

The product of its digits is 8890560, while the sum is 55.

The spelling of 667214537671 in words is "six hundred sixty-seven billion, two hundred fourteen million, five hundred thirty-seven thousand, six hundred seventy-one".