660000001 has 16 divisors (see below), whose sum is σ = 686125440. Its totient is φ = 634423680.

The previous prime is 659999999. The next prime is 660000007. The reversal of 660000001 is 100000066.

It is a cyclic number.

It is not a de Polignac number, because 660000001 - 2¹ = 659999999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660000007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1574970 + ... + 1575388.

It is an arithmetic number, because the mean of its divisors is an integer number (42882840).

Almost surely, 2^660000001 is an apocalyptic number.

It is an amenable number.

660000001 is a deficient number, since it is larger than the sum of its proper divisors (26125439).

660000001 is a wasteful number, since it uses less digits than its factorization.

660000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 660000001 is about 25690.4651767927. The cubic root of 660000001 is about 870.6587695571.

Adding to 660000001 its reverse (100000066), we get a palindrome (760000067).

The spelling of 660000001 in words is "six hundred sixty million, one", and thus it is an aban number.