6666750001 has 4 divisors (see below), whose sum is σ = 7017631600. Its totient is φ = 6315868404.

The previous prime is 6666749993. The next prime is 6666750029. The reversal of 6666750001 is 1000576666.

It is a happy number.

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: 1000576666 = 2 ⋅500288333.

It is a cyclic number.

It is not a de Polignac number, because 6666750001 - 2³ = 6666749993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6666750071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175440771 + ... + 175440808.

It is an arithmetic number, because the mean of its divisors is an integer number (1754407900).

Almost surely, 2^6666750001 is an apocalyptic number.

It is an amenable number.

6666750001 is a deficient number, since it is larger than the sum of its proper divisors (350881599).

6666750001 is a wasteful number, since it uses less digits than its factorization.

6666750001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350881598.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 6666750001 is about 81650.1684076647. The cubic root of 6666750001 is about 1882.0798997904.

The spelling of 6666750001 in words is "six billion, six hundred sixty-six million, seven hundred fifty thousand, one".