666563001 has 8 divisors (see below), whose sum is σ = 957116160. Its totient is φ = 410192592.

The previous prime is 666562991. The next prime is 666563003. The reversal of 666563001 is 100365666.

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

It is not a de Polignac number, because 666563001 - 2⁶ = 666562937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666563003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8545641 + ... + 8545718.

It is an arithmetic number, because the mean of its divisors is an integer number (119639520).

Almost surely, 2^666563001 is an apocalyptic number.

It is an amenable number.

666563001 is a deficient number, since it is larger than the sum of its proper divisors (290553159).

666563001 is a wasteful number, since it uses less digits than its factorization.

666563001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17091375.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 666563001 is about 25817.8814196673. The cubic root of 666563001 is about 873.5351822385.

The spelling of 666563001 in words is "six hundred sixty-six million, five hundred sixty-three thousand, one".