667822001 has 16 divisors (see below), whose sum is σ = 834582528. Its totient is φ = 519147600.

The previous prime is 667821983. The next prime is 667822021. The reversal of 667822001 is 100228766.

It is a cyclic number.

It is not a de Polignac number, because 667822001 - 2¹⁰ = 667820977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667822021) 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 15 ways as a sum of consecutive naturals, for example, 23126 + ... + 43248.

It is an arithmetic number, because the mean of its divisors is an integer number (52161408).

Almost surely, 2^667822001 is an apocalyptic number.

It is an amenable number.

667822001 is a deficient number, since it is larger than the sum of its proper divisors (166760527).

667822001 is a wasteful number, since it uses less digits than its factorization.

667822001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20572.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 667822001 is about 25842.2522431773. The cubic root of 667822001 is about 874.0848122553.

The spelling of 667822001 in words is "six hundred sixty-seven million, eight hundred twenty-two thousand, one".