1000066001 has 4 divisors (see below), whose sum is σ = 1090981104. Its totient is φ = 909150900.

The previous prime is 1000065991. The next prime is 1000066003. The reversal of 1000066001 is 1006600001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1006600001 = 11 ⋅91509091.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000066001 is a prime.

It is a super-2 number, since 2×1000066001² = 2000264012712264002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000066003) 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 3 ways as a sum of consecutive naturals, for example, 45457535 + ... + 45457556.

It is an arithmetic number, because the mean of its divisors is an integer number (272745276).

Almost surely, 2^1000066001 is an apocalyptic number.

1000066001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1000066001 is a deficient number, since it is larger than the sum of its proper divisors (90915103).

1000066001 is an equidigital number, since it uses as much as digits as its factorization.

1000066001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90915102.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1000066001 is about 31623.8201519045. The cubic root of 1000066001 is about 1000.0219998493.

Adding to 1000066001 its reverse (1006600001), we get a palindrome (2006666002).

The spelling of 1000066001 in words is "one billion, sixty-six thousand, one".