667417862441 has 4 divisors (see below), whose sum is σ = 728092213584. Its totient is φ = 606743511300.

The previous prime is 667417862429. The next prime is 667417862513. The reversal of 667417862441 is 144268714766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667417862441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667417822441) 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, 30337175555 + ... + 30337175576.

It is an arithmetic number, because the mean of its divisors is an integer number (182023053396).

Almost surely, 2^667417862441 is an apocalyptic number.

It is an amenable number.

667417862441 is a deficient number, since it is larger than the sum of its proper divisors (60674351143).

667417862441 is a wasteful number, since it uses less digits than its factorization.

667417862441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60674351142.

The product of its digits is 10838016, while the sum is 56.

The spelling of 667417862441 in words is "six hundred sixty-seven billion, four hundred seventeen million, eight hundred sixty-two thousand, four hundred forty-one".