666800007 has 8 divisors (see below), whose sum is σ = 889464576. Its totient is φ = 444334392.

The previous prime is 666799963. The next prime is 666800023. The reversal of 666800007 is 700008666.

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

It is not a de Polignac number, because 666800007 - 2⁸ = 666799751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666800207) 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, 41733 + ... + 55454.

It is an arithmetic number, because the mean of its divisors is an integer number (111183072).

Almost surely, 2^666800007 is an apocalyptic number.

666800007 is a deficient number, since it is larger than the sum of its proper divisors (222664569).

666800007 is a wasteful number, since it uses less digits than its factorization.

666800007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99477.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 666800007 is about 25822.4709700679. The cubic root of 666800007 is about 873.6387026089.

The spelling of 666800007 in words is "six hundred sixty-six million, eight hundred thousand, seven".