667441266557 has 8 divisors (see below), whose sum is σ = 719093961600. Its totient is φ = 615833008560.

The previous prime is 667441266529. The next prime is 667441266559. The reversal of 667441266557 is 755662144766.

It is a happy number.

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 667441266557 - 2¹⁴ = 667441250173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 667441266496 and 667441266505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667441266559) 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, 11078057 + ... + 11138142.

It is an arithmetic number, because the mean of its divisors is an integer number (89886745200).

Almost surely, 2^667441266557 is an apocalyptic number.

It is an amenable number.

667441266557 is a deficient number, since it is larger than the sum of its proper divisors (51652695043).

667441266557 is a wasteful number, since it uses less digits than its factorization.

667441266557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22218523.

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

The spelling of 667441266557 in words is "six hundred sixty-seven billion, four hundred forty-one million, two hundred sixty-six thousand, five hundred fifty-seven".