800400640066 has 8 divisors (see below), whose sum is σ = 1239330023424. Its totient is φ = 387290632260.

The previous prime is 800400640049. The next prime is 800400640073. The reversal of 800400640066 is 660046004008.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6454843810 + ... + 6454843933.

It is an arithmetic number, because the mean of its divisors is an integer number (154916252928).

Almost surely, 2^800400640066 is an apocalyptic number.

800400640066 is a deficient number, since it is larger than the sum of its proper divisors (438929383358).

800400640066 is a wasteful number, since it uses less digits than its factorization.

800400640066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12909687776.

The product of its (nonzero) digits is 27648, while the sum is 34.

The spelling of 800400640066 in words is "eight hundred billion, four hundred million, six hundred forty thousand, sixty-six".