806699643 has 8 divisors (see below), whose sum is σ = 1085652288. Its totient is φ = 532773384.

The previous prime is 806699611. The next prime is 806699653. The reversal of 806699643 is 346996608.

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

It is not a de Polignac number, because 806699643 - 2⁵ = 806699611 is a prime.

It is a super-3 number, since 3×806699643³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (806699653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1256221 + ... + 1256862.

It is an arithmetic number, because the mean of its divisors is an integer number (135706536).

Almost surely, 2^806699643 is an apocalyptic number.

806699643 is a deficient number, since it is larger than the sum of its proper divisors (278952645).

806699643 is a wasteful number, since it uses less digits than its factorization.

806699643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513193.

The product of its (nonzero) digits is 1679616, while the sum is 51.

The square root of 806699643 is about 28402.4583971177. The cubic root of 806699643 is about 930.9019818870.

The spelling of 806699643 in words is "eight hundred six million, six hundred ninety-nine thousand, six hundred forty-three".