667553834471 has 4 divisors (see below), whose sum is σ = 671974720944. Its totient is φ = 663132948000.

The previous prime is 667553834459. The next prime is 667553834509. The reversal of 667553834471 is 174438355766.

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

It is a cyclic number.

It is not a de Polignac number, because 667553834471 - 2¹⁰ = 667553833447 is a prime.

It is a super-3 number, since 3×667553834471³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 667553834471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667556834471) 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, 2210443010 + ... + 2210443311.

It is an arithmetic number, because the mean of its divisors is an integer number (167993680236).

Almost surely, 2^667553834471 is an apocalyptic number.

667553834471 is a deficient number, since it is larger than the sum of its proper divisors (4420886473).

667553834471 is a wasteful number, since it uses less digits than its factorization.

667553834471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4420886472.

The product of its digits is 50803200, while the sum is 59.

The spelling of 667553834471 in words is "six hundred sixty-seven billion, five hundred fifty-three million, eight hundred thirty-four thousand, four hundred seventy-one".