206670239951 has 6 divisors (see below), whose sum is σ = 240412320000. Its totient is φ = 177145919916.

The previous prime is 206670239933. The next prime is 206670239977. The reversal of 206670239951 is 159932076602.

It is a happy number.

It is not a de Polignac number, because 206670239951 - 2⁶ = 206670239887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206670239951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206670239651) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 2108879951 + ... + 2108880048.

It is an arithmetic number, because the mean of its divisors is an integer number (40068720000).

Almost surely, 2^206670239951 is an apocalyptic number.

206670239951 is a deficient number, since it is larger than the sum of its proper divisors (33742080049).

206670239951 is an equidigital number, since it uses as much as digits as its factorization.

206670239951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4217760013 (or 4217760006 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 50.

The spelling of 206670239951 in words is "two hundred six billion, six hundred seventy million, two hundred thirty-nine thousand, nine hundred fifty-one".