206461166651 has 16 divisors (see below), whose sum is σ = 212416374240. Its totient is φ = 200550481920.

The previous prime is 206461166633. The next prime is 206461166657. The reversal of 206461166651 is 156661164602.

It is a cyclic number.

It is not a de Polignac number, because 206461166651 - 2¹⁴ = 206461150267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206461166657) 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, 41397380 + ... + 41402366.

It is an arithmetic number, because the mean of its divisors is an integer number (13276023390).

Almost surely, 2^206461166651 is an apocalyptic number.

206461166651 is a deficient number, since it is larger than the sum of its proper divisors (5955207589).

206461166651 is a wasteful number, since it uses less digits than its factorization.

206461166651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9214.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 206461166651 in words is "two hundred six billion, four hundred sixty-one million, one hundred sixty-six thousand, six hundred fifty-one".