667011001 has 8 divisors (see below), whose sum is σ = 692642664. Its totient is φ = 641825280.

The previous prime is 667010987. The next prime is 667011011. The reversal of 667011001 is 100110766.

It can be written as a sum of positive squares in 4 ways, for example, as 13697401 + 653313600 = 3701^2 + 25560^2 .

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 667011001 - 2⁹ = 667010489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667011011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108436 + ... + 114421.

It is an arithmetic number, because the mean of its divisors is an integer number (86580333).

Almost surely, 2^667011001 is an apocalyptic number.

It is an amenable number.

667011001 is a deficient number, since it is larger than the sum of its proper divisors (25631663).

667011001 is a wasteful number, since it uses less digits than its factorization.

667011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222971.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 667011001 is about 25826.5561196223. The cubic root of 667011001 is about 873.7308407229.

Adding to 667011001 its reverse (100110766), we get a palindrome (767121767).

It can be divided in two parts, 6670 and 11001, that added together give a palindrome (17671).

The spelling of 667011001 in words is "six hundred sixty-seven million, eleven thousand, one".