667647445111 has 8 divisors (see below), whose sum is σ = 670843939248. Its totient is φ = 664451256000.

The previous prime is 667647445081. The next prime is 667647445121. The reversal of 667647445111 is 111544746766.

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 667647445111 - 2⁹ = 667647444599 is a prime.

It is a super-2 number, since 2×667647445111² (a number of 24 digits) contains 22 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 (667647445121) 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, 5173491 + ... + 5300971.

It is an arithmetic number, because the mean of its divisors is an integer number (83855492406).

Almost surely, 2^667647445111 is an apocalyptic number.

667647445111 is a deficient number, since it is larger than the sum of its proper divisors (3196494137).

667647445111 is a wasteful number, since it uses less digits than its factorization.

667647445111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152513.

The product of its digits is 3386880, while the sum is 52.

The spelling of 667647445111 in words is "six hundred sixty-seven billion, six hundred forty-seven million, four hundred forty-five thousand, one hundred eleven".