206720006 has 32 divisors (see below), whose sum is σ = 326937600. Its totient is φ = 97929216.

The previous prime is 206719969. The next prime is 206720009. The reversal of 206720006 is 600027602.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206720009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 804230 + ... + 804486.

It is an arithmetic number, because the mean of its divisors is an integer number (10216800).

Almost surely, 2^206720006 is an apocalyptic number.

206720006 is a deficient number, since it is larger than the sum of its proper divisors (120217594).

206720006 is a wasteful number, since it uses less digits than its factorization.

206720006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 206720006 is about 14377.7608131447. The cubic root of 206720006 is about 591.2813347478.

Adding to 206720006 its reverse (600027602), we get a palindrome (806747608).

The spelling of 206720006 in words is "two hundred six million, seven hundred twenty thousand, six".