667441266665 has 8 divisors (see below), whose sum is σ = 805079415048. Its totient is φ = 531186416640.

The previous prime is 667441266647. The next prime is 667441266683. The reversal of 667441266665 is 566662144766.

It is an interprime number because it is at equal distance from previous prime (667441266647) and next prime (667441266683).

It can be written as a sum of positive squares in 4 ways, for example, as 501177769 + 666940088896 = 22387^2 + 816664^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 667441266665 - 2⁶ = 667441266601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345823526 + ... + 345825455.

It is an arithmetic number, because the mean of its divisors is an integer number (100634926881).

Almost surely, 2^667441266665 is an apocalyptic number.

It is an amenable number.

667441266665 is a deficient number, since it is larger than the sum of its proper divisors (137638148383).

667441266665 is a wasteful number, since it uses less digits than its factorization.

667441266665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691649179.

The product of its digits is 52254720, while the sum is 59.

The spelling of 667441266665 in words is "six hundred sixty-seven billion, four hundred forty-one million, two hundred sixty-six thousand, six hundred sixty-five".