206666314162646 has 32 divisors (see below), whose sum is σ = 334652102443008. Its totient is φ = 95154275181600.

The previous prime is 206666314162621. The next prime is 206666314162699. The reversal of 206666314162646 is 646261413666602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14025251 + ... + 24698993.

It is an arithmetic number, because the mean of its divisors is an integer number (10457878201344).

Almost surely, 2^{206666314162646} is an apocalyptic number.

206666314162646 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

206666314162646 is a deficient number, since it is larger than the sum of its proper divisors (127985788280362).

206666314162646 is a wasteful number, since it uses less digits than its factorization.

206666314162646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10675556.

The product of its (nonzero) digits is 53747712, while the sum is 59.

The spelling of 206666314162646 in words is "two hundred six trillion, six hundred sixty-six billion, three hundred fourteen million, one hundred sixty-two thousand, six hundred forty-six".